1. These children are orphans. She is taking care of these children.

->...........She is taking care of these children, who are orphans.............................................

2. You were out three hours ago. You had a missed call at that time.

->.....You were out three hours ago, when you had a missed call.......................................................

 3. He never forgets the year 1982. His own company went bankrupt in 1982

->................He never forgets the year 1982, when his own company went bankrupt....................................

 4. My father goes swimming every day. You met him this morning.

->......My father, whom you met this morning, goes swimming everyday....................................................

5. There are a lot of fruit in summer. The weather is hot in summer.

->....There are a lot of fruit in summer, when the weather is hot.................................................

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

->........The man whom I respect most is my father..................................................

 7. I can have a good sleep on Saturday night. It is the best time of a week.

->.....I can have a good sleep on Saturday night, which is the best time of a week..............................................

 8. The man is my father. I respect his opinion most.

->................The man whose opinion I respect most is my father.....................................

9. Mary and Margaret are twins. You met them yesterday.

->......Mary and Margaret, whom you met yesterday, are twins...........................................

 10. The students will be awarded tomorrow. It is forecasted to have a rain tomorrow. 

->......The students will be awarded tomorrow, when it is forecasted to have a rain tomorrow.............................................

1. Last week I went to see the house. I used to live in it.

->...........Last week I went to see the house in which I used to live ............................

2. He used to go to work late. That’s why he was sacked.

->..........He used to go to schoo late, which is why he was sacked..............................

3. 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...............................

4. The report was prepared yesterday. There was a heavy rain outside yesterday.

->..........The report was prepared yesterday, when there was a heavy rain outside...............................

5. Her husband was abroad in September. She bought this house at that time.

->........Her husband was abroad in September, when she bought this house.................................

6. This is my beloved school. I studied here when I was young.

->.............This is my beloved school, where I studied when I was young............................

7. They came home very late last night. Most of the family member had gone to sleep at that time.

->..They came home very late last night, when most of the family member had gone to sleep.......................................

8. I bought these pencils at the shop over there.

->..........I bought these pencils at the shop which is over there...............................

9. John was absent from class yesterday. She knew the reason for this but she didn’t tell the teacher.

->........She knew the reason why John was absent from class yesterday but she didn't tell the teacher.................................

10. Everybody is off on Sunday. The children often go swimming on Sunday

->.....Everybody is off on Sunday, when the children often go swimming....................................

1. This is the man. I met him in Paris.

->...............This is the man whom I met in Paris..........................................................................

2. I wanted the painting. You bought it.

->...............I wanted the painting which you bought..........................................................................

3. This is the chair. My parents gave it to me.

->........This is the chair which my parents gave to me ..................................................

 4. She’s the woman. She telephoned the police.

->............She's the women who telephoned the police.............................................

 5. He’s the person. He wanted to buy your house.

->..........He's the person who wanted to buy your house................................................

 6. We threw out the computer. It never worked properly.

->........We threw out the computer which never worked properly...................................................

7. This is the lion. It’s been ill recently.

->............This is the lion which has been ill recently ..............................................

 8. The man was badly injured. He was driving the car.

->...............The man who was driving the car was badly injured.............................................

9. The children broke the window. They live in the next street.

->..............The children who broke the window live in the next street...............................................

10. That’s the woman. I was telling you about her. 

->........That's the women about whom I was telling you.......................................................

1. The house...in which......... I was born is for sales.

2. It is the chair.....on which......... he used to sit for meals.

3. In the middle of the village, there is a well .....from which......the villagers take water to drink.

4. I must thank the people.....from whom........ I got the present.

5. Do you know the doctor......to whom........... I send?

6. The man...about whom.......... I was telling you is standing over there.

7. This is the man....to whom......... I gave some money this morning.

8. Ms. Young,......to whom...... many of her students are writing, is living happily and peacefully in Canada.

9. I like the teacher.......with whom........ I learnt English in high school.

10. I’m doing a group work. Mr. John...with whom.......... I was working is so generous and kind

1. Tom made a number of suggestions, most of.....which....... were very helpful.

2. Mart has three brothers, all of....whom........... are married.

3. We were given a lot of information, most of...........which..... was useless.

4. There were a lot of people at the party, only..........a few of whom I had met before.

5. I sent her two letters, neither of .........whom....she has received.

6. I have two sisters, both of..........whom..... are doctors.

7. He lent me many picture-books, most of.....which.......... I had red.

8. The bur crashed into a queue of people. Four of .......whom........were killed.

9. He paid me $5 for cleaning ten windows, most of ......which........hadn't been cleaned for at least a year.

10. In prison they fed us on dry bread, most of ......which........was moldy.

Exercise 3: Complete the sentences with relative pronoun or adverb = who, whom, that, which, whose or where, when, why.

1. Please tell me the reason...why......... I should let you go

2. Tell me the countries.......where..... the traffic moves on the left-hand side.

3. We keep our bread in the fridge.......where....... it doesn’t go bad

4. I used to enjoy the summer........when...... we had a big family picnic.

5. Did you remember the day.........when...... I first met you?

6. Thank you very much for the present......which......... you sent me.

7. This is Mrs. Jones,.........whose..... son won the championship last year.

8.All of the people are looking at the man.....whose.......son has been kidnapped

9. The student with ........whom.......she was dancing had a slight limb.

10. The man for...........whom..... I was waiting didn’t turn up.

1. We visited the school where my father taught

2. I met her last month, when she came to our house.

3. We all looked at the place where the fire had started.

4. Did they tell you the reason why they were late?

5. We must find a time when we can meet and a place we can talk.

6. They arrived in the evening, at a time when we were all out.

7. I couldn’t understand the reason why they were so rude.

8. I met him in the café where he was working as a waiter.

9. I listen to music late at night, when the children have gone to bed.

10. I bought them in August, when I was in France.

Câu 5:

\(\left\{{}\begin{matrix}x=12-4t\\y=3+t\end{matrix}\right.\)(Δ)

=>\(A\left(12-4t;3+t\right)\left(t\in R\right)\) là những điểm thuộc Δ