K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

28 tháng 8 2021

1. I don’t like students …………who………go to school late.
2. I’ll never forget the day …………when………we first meet.
3. Did you get the message ……………which……I left for you?
4. I recently went back to the town ……………where……I was born.
5. She didn’t tell us the reason ………why…………she gave up her job.
6. The Chemist’s is the shop ………where…………you can buy medicine.
7. He has just come back to the village …where………………he was born.
8. The woman ………………whose…… son was injured in the accident is crying loudly.
9. You need to talk to a person, …whom………………you can trust. You will feel better if you do.
10. Do you know the name of the woman ………who…………talked about the festival in Hue every two years?

III- Give the correct form of the verbs in special materials.

1.The astrronaut's clothes(make)...were made... from special materials.

2. My teacher was not at home when I arrived. She (just go)...has just gone..out.

3. Jeans (make)..were made...about two hundred years ago .

4. If you go to England, you'll have to get used to(drive)...drive.....on the left.

5. You may feel frightened when you are in a forest(surround)...surrounded...by tall trees.

7. Look, Hoa! Do you know the man who(talk)...is talking.....to Mrs.Luy in the playground?

27 tháng 8 2023

1.were made

2.has just gone 

3.were made

4.drive

5.surrounded

6.had known

7.is talking

8.would do

9.returns

10.listening

I. Fill in the blanks with WHO, WHICH, WHOSE. WHY or WHEN: 1. The man ______ mobile was ringing did not know what to do. 2. The woman ______ daughter was crying tried to calm her down. 3. The family ______ car was stolen last week is the Smiths. 4. That’s the village ______ I used to live.​ 5. That’s the day ______ you came to visit me. 6. That’s the place ______the car turned over. 7. Are those the reason ______ you went abroad? 8. Tell me the reasons ______ he told you yesterday 9....
Đọc tiếp

I. Fill in the blanks with WHO, WHICH, WHOSE. WHY or WHEN:

1. The man ______ mobile was ringing did not know what to do.

2. The woman ______ daughter was crying tried to calm her down.

3. The family ______ car was stolen last week is the Smiths.

4. That’s the village ______ I used to live.​

5. That’s the day ______ you came to visit me.

6. That’s the place ______the car turned over.

7. Are those the reason ______ you went abroad?

8. Tell me the reasons ______ he told you yesterday

9. Do you still remember the day ______ we first met?

10. They took her to the hospital ______is only a mile away.

II. Choose the best answers

1. Do you still remember the day ______ we first met?

A. where ​B. whom​​C. which​​D. when

2. This school is often for children _____ first language is not English.

A. who​​B. that​​​C. whose​​D. X

3. They took her to the hospital ______is only a mile away.

A. which​B. where​​C. in which​​D. that

4. That is a house..............I was born .

A. in which​B. in that​​C. which in​​D.in where

5. I recently visited the school..............I used to study five years ago .

A. which​B. where​​C. that​​​D. at where

6. . Lan is a small girl .............mother tells her about Tidal wave in Japan last year

A. who​​B. whose​​C. that​​​D. whom

III. Combine each pair of sentences in to one using relative pronounces.

1. The restaurant serves good food. We enjoy having dinner there.

-> _____________________________________________

2. That river is not safe for swimming. Its water is polluted.

-> _____________________________________________

3. Can you suggest the time? We’ll meet at that time.

-> _____________________________________________

4. He is going to Spain. His daughter has been living there for 4 years.

->______________________________________________

5. . Tell me the reason. You left the city for it.

->______________________________________________

6. That man seem very lonely. His wife and family are away.

->______________________________________________

7. Melanie is looking after a dog. The dog’s leg has been broken.

->______________________________________________

0
3 tháng 11 2018

2 Complete the sentence with "who, whom, which, where, when" 1. Is there anything.......which......i can do?

2. I don't like food....which........is very spicy.

3. he is a man....whose.....friends alwways trust him

4. last week i returned to my home village..where...i was born 5. I'll never forget the day...when...... you gave me a surprise birthday party.

6. The people..who.. live in Greece speak Greek. ept

7. What's the name of the girl...who....is wearing a white blouse?

8. We all thanked him.......who......gave us a lot of help.

9. The hotel......where......we stayed wasn't very clean.

10. I enjoy reading the books .......which........tell about different cultures.

11. The girl.........whose......eyes are blue is Mr. Brown's daughter. 12. The car .........which....... he has just bought is very expensive.

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing 1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary' 2. I call Nhi but she pretended not to hear and went on(do) her work 3. My mother love(cook) 4. Dang,stop(talk)! The class is noisy just because of you 5. I am do the exercises carefully to avoid(make) mistakes 6. I prefer(play) chess to going to the theater 7. Do you mind(move) your chair a bit side? 8. Have you finished(work) on yout...
Đọc tiếp

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing
1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary'
2. I call Nhi but she pretended not to hear and went on(do) her work
3. My mother love(cook)
4. Dang,stop(talk)! The class is noisy just because of you
5. I am do the exercises carefully to avoid(make) mistakes
6. I prefer(play) chess to going to the theater
7. Do you mind(move) your chair a bit side?
8. Have you finished(work) on yout project?
9. Do you enjoy(listen) to Pop music?
10.Quang has always hated(do) his homework
11. My brother spent hours..........(repair) his motorbiker.
12. Don't forget to bring my dictionary when you ..........(come) back tomorrow.
13. You..........(feel) cold if the sun ..........(not shine) .
14. I'm tired after that long walk. I'm not used to..........(walk) so far.
15. Bill never carries money with him. He's afraid of ..........(rob)
16. It is easy (be) wise after the event.
17. Do you (wish) (make) a complaint?
18.We don't (want) anybody (know) that we are here.
19.If you can't (remember) his number you'd better (look) it up.
20. I want her (learn) Esperanto; I think everybody ought to (know) it?21. Visitors are asked (not feed) the animals.
III/ Combine these sentences with who , whom , which.
1. I thanked the woman. She helped me.
2. She is the most intelligent woman. I’ve ever met this woman.
3. The doctor is famous. You visited him yesterday.
4. Do you know the music? It is being played on the radio.
5. These children are orphans. She is taking care of these children.
6. She couldn’t come to the party. This is a pity.
7. The man answered the phone. He said Tom was out.
8. Who is the woman? We met her here last year.
9. Try to read the book . I gave it to you yesterday.
10. A typhoon is a violet tropical storm. It can cause great destruction.

1
5 tháng 3 2020

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing
1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary'
2. I call Nhi but she pretended not to hear and went on(do)doing her work
3. My mother loves(cook) cooking
4. Dang,stop(talk) talking! The class is noisy just because of you
5. I am do the exercises carefully to avoid(make) making mistakes
6. I prefer(play) playing chess to going to the theater
7. Do you mind(move) to move your chair a bit side?
8. Have you finished(work) worked on yout project?
9. Do you enjoy(listen) listening to Pop music?
10.Quang has always hated(do) doing his homework
11. My brother spent hours.repairing....(repair) his motorbiker.
12. Don't forget to bring my dictionary when you .....come.....(come) back tomorrow.
13. You....will feel.....(feel) cold if the sun ....doesn't shine......(not shine) .
14. I'm tired after that long walk. I'm not used to....walking......(walk) so far.
15. Bill never carries money with him. He's afraid of ....robbing......(rob)
16. It is easy (be) to be wise after the event.
17. Do you (wish) wish (make)made a complaint?
18.We don't (want)want anybody (know)know that we are here.
19.If you can't (remember) remember his number you'd better (look)look it up.
20. I want her (learn)to learn Esperanto; I think everybody ought to (knowknow ) it?21. Visitors are asked (not feed)not to feed the animals.
III/ Combine these sentences with who , whom , which.
1. I thanked the woman. She helped me.

=> I thanked the woman who help me
2. She is the most intelligent woman. I’ve ever met this woman.

=> She is the most intelligent woman who I've ever met
3. The doctor is famous. You visited him yesterday.

=> The doctor is famous who you visited yesterday
4. Do you know the music? It is being played on the radio.

=> Do you know the music which is being played on the radio
5. These children are orphans. She is taking care of these children.

=> These children are orphans who she is taking care of

Combine each pair of sentences into one by using a sutable RELATIVE CLAUSES : 1. She is the woman. I told you about her. 2. You didn't tell us the reason. We have to cut down our daily expenses for that reason. 3. I recently went back to Paris. I was born there nearly 50 years ago. 4. Do you know the music ? Is it being played on the radio. 5. I saw a lot of people and horses. They went to the market. 6. I've seen the little girl and her puppy. They have lived next door for ages. 7. This...
Đọc tiếp

Combine each pair of sentences into one by using a sutable RELATIVE CLAUSES :

1. She is the woman. I told you about her.

2. You didn't tell us the reason. We have to cut down our daily expenses for that reason.

3. I recently went back to Paris. I was born there nearly 50 years ago.

4. Do you know the music ? Is it being played on the radio.

5. I saw a lot of people and horses. They went to the market.

6. I've seen the little girl and her puppy. They have lived next door for ages.

7. This is Mrs. Jones. Her son won the champoinship last year.

8. Is this the style of hair ? Your wife wants to have it.

9. The professor is excellent. I am taking his course.

10. The building is the tallest one in town. He works in that building.

11. Mr.Brown is a nice teacher. We studied with him last year.

12.The day was rainy. She left on that day.

13. Her father died last year. She looked after him for over twenty years.

14. Is that the computer ? Your father bought it last month.

15. This is the place. We visited this place last week.

1
15 tháng 4 2020

Combine each pair of sentences into one by using a sutable RELATIVE CLAUSES :

1. She is the woman. I told you about her.

She is the woman whom I told you about.

2. You didn't tell us the reason. We have to cut down our daily expenses for that reason.

You didn't tell us the reason why we have to cut down our daily expenses.

3. I recently went back to Paris. I was born there nearly 50 years ago.

I recently went back to Paris where I was born nearly 50 years ago.

4. Do you know the music ? Is it being played on the radio.

Do you know the music which is being played on the radio?

5. I saw a lot of people and horses. They went to the market.

I saw a lot of people and horses that went to the market.

6. I've seen the little girl and her puppy. They have lived next door for ages.

I've seen the little girl and her puppy that have lived next door for ages.

7. This is Mrs. Jones. Her son won the champoinship last year.

This is Mrs. Jones whose son won the champoinship last year.

8. Is this the style of hair ? Your wife wants to have it.

Is this the style of hair which Your wife wants to have?

9. The professor is excellent. I am taking his course.

The professor whose course I am taking is excellent.

10. The building is the tallest one in town. He works in that building.

The building which he works in is the tallest one in town.

11. Mr.Brown is a nice teacher. We studied with him last year.

Mr.Brown whom we studied with is a nice teacher last year.

12.The day was rainy. She left on that day.

The day when she left was rainy.

13. Her father died last year. She looked after him for over twenty years.

Her father whom she looked after for over twenty years died last year.

14. Is that the computer ? Your father bought it last month.

Is that the computer which your father bought last month?

15. This is the place. We visited this place last week.

This is the place which we visited last week.

6 tháng 12 2018

1.He met many friends who encouraged him in his work
2.He often tells me about his village where he was born
3. Can you understand the question which he asked you last time?
4. The man whose son plays with us every day is an architect
5. The city which we spent our vacation in was very beautiful

Use a Relative pronoun or Relative adverb to combine each pair of sentences below. 1. The student is from China. He sits next to me. 2. I thanked the woman. This woman had helped me. 3. The professor is excellent. I'm taking his course. 4. Jim passed the exam. This surprised everybody. 5. Mr Smith said he was too busy to speak to me. I had come to see him. 6. The man is my father. I respect this man most. 7. The man is my father. I respect his opinions most. 8. I saw a lot of people and...
Đọc tiếp

Use a Relative pronoun or Relative adverb to combine each pair of sentences below.

1. The student is from China. He sits next to me.

2. I thanked the woman. This woman had helped me.

3. The professor is excellent. I'm taking his course.

4. Jim passed the exam. This surprised everybody.

5. Mr Smith said he was too busy to speak to me. I had come to see him.

6. The man is my father. I respect this man most.

7. The man is my father. I respect his opinions most.

8. I saw a lot of people and horses. They went to market.

9. Tom has three sisters. All of them are married.

10. I recently went back to Paris. It is still as beautiful as a pearl.

11. I recently went back to Paris. I was born in Paris nearly 50 years ago.

12. She is the most intelligent woman. I've ever met this woman.

13. This doctor is famous. You visited him yesterday.

14. Do you know the music? It is being played on the radio.

15. The police want to know the hotel. Mr Foster stayed there two weeks ago.

16. You didn't tell us the reason. We have to cut down our daily expenses for that reason.

17. The day was rainy. She left on that day.

18. The reason hasn't been told yet. The president will come to that city for this reason.

19. Phuong Thao is a singer. You like her music best.

20. She couldn't come to the party. This is a pity.

21. I've sent him two letters. He has received neither of them.

22. That man is an artist. I don't remember the man's name.

23. The reason is not valid. You gave it yesterday.

24. We enjoyed the city. We spent our vacation in this city.

25. One of the elephants had only one tusk. We saw these elephants at the zoo.

26. I looked at the moon. It was very bright that evening.

27. My father goes swimming everyday. You met him this morning.

28. That car belongs to Dr Clark. It's engine is very good.

29. In the class there are 48 students. The teacher knows only a few of them.

30. The pupils haven't done their homework? It is too bad.

3
3 tháng 8 2019

Luyện tập tổng hợpLuyện tập tổng hợp

3 tháng 8 2019

Luyện tập tổng hợp

Exercise 1. Put the correct prepositions in the blanks for combination with GET Get away from Get down Get on / along with Get off Get into Get away with Get down to Get over Get off with Get back Get on Get out of Get through 1.He promised to act as chairman, so I’m afraid he can’t get ____ it now. There’s no one else to do it. 2.She is a friendly girl who gets ________ everyone she meets. 3.It took her a long time to get ______ the death of her husband. 4.I tried to ring him...
Đọc tiếp
Exercise 1. Put the correct prepositions in the blanks for combination with GET Get away from Get down Get on / along with Get off Get into Get away with Get down to Get over Get off with Get back Get on Get out of Get through 1.He promised to act as chairman, so I’m afraid he can’t get ____ it now. There’s no one else to do it. 2.She is a friendly girl who gets ________ everyone she meets. 3.It took her a long time to get ______ the death of her husband. 4.I tried to ring him up but I couldn’t get _____ : I think some of the lines are down after last night’s storm. 5.She talks so much that it is difficult to get _______ from her. 6.Get ______ the bus at Victoria Station. 7.How are you getting _________ your work ? 8.I’m not getting _______ very fast because I can only type with two fingers. 9.We got ______ late because we missed the last train. 10.Don’t worry about my snake. He can’t get _______ his box. 11.This rainy weather is really getting me ________. 12.It’s time you got _______ some serious work. It’s very important to you. 13.Thieves raided the bank and got ________ a lot of money. 14.My boy is getting _________ bad habits, such as smokin, staying up late.... 15.We got _______ immediately after the breakfast. Exercise 2. Put the correct prepositions in the blanks for combination with GIVE Give away Give off Give over to Give up Give back Give out Give in Give oneself up 1.He won 100$ and gave it all ________. 2.Riding is getting too expensive: I’ll have to give it ________. 3.He gave _______all the books he had borrowed. 4.After 4 days of freedom, the escaped prisoner gave himself _______ to local police. 5.Your secret is safe with me. I won’t give it ________. 6.The diver’s supply of oxygen gave __ and he had to be brought to the surface as quickly as possible 7.After his fourth attemp he gave _______ trying to pass the driving test. 8.If you want to save money, give _______ eating in expensive restaurants. 9.There was a man giving _______ leaflets outside the church. 10.She gave ______ state secret to the enemy. 11.Could you give me _______ my pen when you’ve finished using it? 12.Please give your exam papers ______ to the teacher when you’ve finished! 13.The cooker is giving _______ a funny smell. 14.This big hall is given ________ meeting. 15.She’s a gusty player : she never gives __________ Exercise 3. Put the correct prepositions in the blanks for combination with GO Go away Go down with Go on Go out Go through with Go back on Go in for Go off Go round Go up Go down Go into Go over Go through Go with 1.The guard dog went ______ the intruder and knocked him down. 2.He had a sandwich and a cup of coffee, then went _______ working. 3.I went ______ the proposal very carefully with my lawyer and finally decided to to accept his offer. 4.She went ______ a beauty contest and got a prize. 5.The price of tomatoes usually goes ________ in summer in England. 6.If there isn’t enough soup to go ________, just put some hot water in it. 7.You can’t go _______ your promise now: we are depending on you. 8.They have gone _______ all the calculations again but they still can’t find the mistake. 9.The gun went ______ by accident and wounded him in the leg. 10.Mary went ______ in such a hurry that she left her passport behind. 11.Why don’t you go _______ stamp collecting if you want a quiet hobby ? 12.Her weight went ______ to 70 kilos when she stopped playing tennis. 13.When did Britain go ________ EEC ? 14.Our youngest boy has gone __________ mumps! 15.Her blouse doesn’t go _______ her skirt. 16.Finally, I’ve gone ________ all my exams! 17.Which events is he going __________ at the Olympics? 18.The first episode of the film goes ________ next Friday evening at 8 o’clock. 19.There must be a party going _______ next door. They’re making so much noise! 20.The thieves ran away when the burglar alarm went __________. Exercise 4. Put the correct prepositions in the blanks for combination with HAND, GROW, HANG, JUMP Grow on Grow up Hand down Hang about Hang on to Jump at Grow out of Hand over Hand out Hang back Jump on 1.Most of my clothes were handed _____ to me by my older brother. 2.President Bush should hand ______ power to Iraqui elected government. 3.Relief workers were handing _______ emergency rations to the survivors. 4.My daughter is growing _______ very fast. She has grown _______ all her clothes. 5.This book is very interesting. I’m sure it will grow ________ you. 6.You should keep an eye on this stranger. He has been hanging _____ our neighbourhood for hours. 7.At first, he volunteered to help me, but on second thought he was afraid and hung ______. 8.I should hang ______ those oldphotographs–they may be valuable. 9.My maths teacher really used to jump _____ us when we got our answer wrong. 10.If they offered me a job in the USA, I’d jump _______ the chance. Exercise 5. Put the correct prepositions in the blanks for combination with HOLD, KEEP Hold on Hold out Hold up Keep down Keep away Keep off Hold off Hold back Hold with Keep up with Keep back Keep up 1.“ What a terrible news!”, she just managed to hold _________ her anger. 2.I don’t hold _______ his view on education. 3.After the hold–_______, the gang made their getaway in a stolen car. 4.The survivors of the plane crash managed to hold _______ till help came. 5.Her illness is getting worse. Doctors hold ______ little hope of her recovery. 6.Could you hold ______ making decision until next week. I’m trying to find out the best solution. 7.She kept ______ working although she was very tired. 8.They lit a fire to keep wild animals __________. 9.The people in this country have been kept _______ for years by a brutal regime. 10.Keep your voices ________ : your mother is trying to get some sleep. 11.You’re all doing a spendid job. Keep _______ the good work. 12.Police warned by–standers to keep ________ from the blazing building. 13.I can’t keep ________ all the changes in computer technology. 14.She is a good secretary, but she is kept _______ by her ignorance of languages. 15.The country was in a state of rebellion and was only kept _______ by repressive measures. Exercise 6. Put the correct prepositions in the blanks for combination with LAY, LEAVE, LET, LIVE Lay down Lay up Leave out Let off (with) Live on Lay out Leave off Let down Let out Live up to 1.There is a lot of beautiful jewellery laid _______ in the shop window. 2.You should lay _______ some money in the rainy days. 3.You didn’t have any right to lay _______ such hard rules. 4.My name has been misspelt–you’ve left _______ a letter. 5.I wish you’d leave ________ complaining about my cooking. 6.The boy’s getting so fat that his trousers have to be let _____ round the waist. 7.She was let _______ with a fine instead of being sent to prison. 8.He felt he really let the team ________ when he missed the penalty. 9.Don’t let these criminals ________ lightly. 10.As he’s retired, he now lives mainly _________ his pension. 11.My exam results didn’t live _________ my expectations, 12.You can’t live ________ 22 calories a day. Exercise 7. Put the correct prepositions in the blanks for combination with LOOK 1.We are looking ____ you for your help. 2. We must look __ a bit before deciding where to buy a house 3. Police will be looking _ trouble–makers at today’s match. 4. Please look __ on me when you have free time 5.His disappearance is being looked _________ by the police. 6. Do look me __ the next time you’re in London. 6. Children always look _____ their parents. 8. She is looked __ as the leading authority on this subject 9.Who will look ______ the children while their mother is in hospital ? 10.We are so much looking __________ seeing you next week. 11.Look _______ the time of the next trainin the timetable. 12.He was looked _________ because of his humble background. 13.She looked _______ when she heard the noise behind her. 14.Tenants must look __________ the house before they decided to rent it. GIẢI NHANH MÌNH TICK CHO NHA
2
5 tháng 8 2019

chịu khó đăng lại bài xong tách ra đi dài quá

14 tháng 1 2021

Dài v

Use a Relative Adverb to combine each pair of the sentences below. 1. This is the house. We often stay in this house in the summer. 2. That was the time. He managed the enterprise at that time. 3. I'll show you the second-hand bookshop. You can find valuable books in this shop. 4. I never forget the park. We met each other for the first time at this park. 5. The police want to know the hotel. Mr Bush stayed at this hotel two weeks ago. 6. The reasons are basic grammatical ones? I'm...
Đọc tiếp

Use a Relative Adverb to combine each pair of the sentences below.

1. This is the house. We often stay in this house in the summer.

2. That was the time. He managed the enterprise at that time.

3. I'll show you the second-hand bookshop. You can find valuable books in this shop.

4. I never forget the park. We met each other for the first time at this park.

5. The police want to know the hotel. Mr Bush stayed at this hotel two weeks ago.

6. The reasons are basic grammatical ones? I'm scolded by the teacher for these reasons.

7. She doesn't want to speak to the cause. She divorced her husband for this cause.

8. The road is shaded with trees. I go to school on this road every day.

9. I have not decided the day. I'll go to London on that day.

10. He doesn't want to sell the house. He was born in this house.

11. The airport is the most modern one. We are going to arrive at this airport.

12. He was born on the day. His father was away on that day.

13. The days were the saddest ones. I lived far from home on those days.

14. I do not know the reason. Sh left school for it.

15. The bed has no mattress. I sleep on this bed.

16. Our school has a good laboratory. The students practise chemistry in the laboratory.

17. You didn't tell us the reason. We had to cut down our daily expenses for that reason.

18. The book is a telephone directory. We can look up telephone numbers in this book.

19. Mrs Brown rang Dr Brown. He was going to carry out an urgent operation at that moment.

20. This is the house. We have lived there for 5 years.

1
2 tháng 8 2019

Use a Relative Adverb to combine each pair of the sentences below.

1. This is the house. We often stay in this house in the summer.

=> This is the house where we often stay in the summer.

2. That was the time. He managed the enterprise at that time.

=> That was the time when he managed the enterprise.

3. I'll show you the second-hand bookshop. You can find valuable books in this shop.

=> I'll show you the second-hand bookshop where you can find valuable books.

4. I never forget the park. We met each other for the first time at this park.

=> I never forget the park where we met each other for the first time.

5. The police want to know the hotel. Mr Bush stayed at this hotel two weeks ago.

=> The police want to know the hotel where Mr Bush stayed two weeks ago.

6. The reasons are basic grammatical ones? I'm scolded by the teacher for these reasons.

=> The reasons why I'm scolded by the teacher are basic grammatical ones?

7. She doesn't want to speak to the cause. She divorced her husband for this cause.

=> She doesn't want to speak to the cause why she divorced her husband.

8. The road is shaded with trees. I go to school on this road every day.

=> The road where I go to school on this road every day is shaded with trees.

9. I have not decided the day. I'll go to London on that day.

=> I have not decided the day when I'll go to London.

10. He doesn't want to sell the house. He was born in this house.

=> He doesn't want to sell the house where he was born.

11. The airport is the most modern one. We are going to arrive at this airport.

=> The airport where w e are going to arrive is the most modern one.

12. He was born on the day. His father was away on that day.

=> He was born on the day when his father was away.

13. The days were the saddest ones. I lived far from home on those days.

=> The days when I lived far from home were the saddest ones.

14. I do not know the reason. She left school for it.

=> I do not know the reason why she left school.

15. The bed has no mattress. I sleep on this bed.

=> The bed where I sleep has no mattress.

16. Our school has a good laboratory. The students practise chemistry in the laboratory.

=> Our school has a good laboratory where the students practise chemistry.

17. You didn't tell us the reason. We had to cut down our daily expenses for that reason.

=> You didn't tell us the reason why we had to cut down our daily expenses.

18. The book is a telephone directory. We can look up telephone numbers in this book.

=> The book where we can look up telephone numbers is a telephone directory.

19. Mrs Brown rang Dr Brown. He was going to carry out an urgent operation at that moment.

=> Mrs Brown rang Dr Brown when he was going to carry out an urgent operation.

20. This is the house. We have lived there for 5 years.

=> This is the house where we have lived for 5 years.