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1, D 2,C 3,C 4,A 5,D 6,A 7,A 8, D 9,D 10,C 11,B 12,C 13,A 14,A 15,C.
Đúng không?
1 We can save natural _________ by using so far energy.
A, products b, forest c, wildlife d, resources
2 So many people nowadays are _____ computers and mobile phones, They use them a lot .
A bored with b afraid of c, addicted d, worried about
3 How much time do you spend ______ a wed a day?
A surf b, to surf c, surfing d, to have surfed
4 It’s too hot and my hair needs __________
A, to cut b, cut c, being cut d, cutting
5 The policemen _______ him to go with them to the police station.
A, let b, caused c, made d, forced
6 My brother won’t come home _______ 10 p.m
A, until b, to c, on d,in
7 I was ________ in the countryside and went to a village school .
A, brought up b, carried on c, given up d, taken up
8 This is the first time I ___________ his mother. She is so kind.
A, meet b, met c, am meeting d, have met
9 Thank to the internet, people can get the ____________ information.
A, late b, later c, lately d, latest
10 Most of the flowers ____ in this area are exported to Eutopean countries.
A, growing b, grow c, grown d, to grow
11 He refused ________ with me.
A, go b, to go c, going d, having gone
12 Since the age of ten, he ___________ in this town with hid grandparents.
A, lives b, lived c, has lived c, is living
13 If you’ve got a headache, why don’t you try ___________ an aspirin?
A, to take b, taking c, to be taken d, being taken
14 The phone rang when I _______ a bath.
A, was having b, had c, have d, have had
15 Look at the big old tree at the ____ to the village, It is a banyann tree.
A, exit b, entrance c, way d, going
Exercise 1: Choose the best option that best completes each sentence:
1. The students used to___________ football in that stadium. A. played B. play C. playing D. are playing
2. Her parents want him___________ some good books to read. A. to choose B. choose C. chose D. choosing
3. Would you like__________ and visit my country? A. come B. coming C. to come D. came
4. My children are lucky___________ the chance to visit the capital again. A. have B. having C. are having D. to have
5. The children enjoy___________ with their friends through computers. A. to chat B. chat C. chatting D. chatted
6. Her father used to___________ abroad for his business. A. traveling B. traveled C. travel D. is traveling
7. Since the worldwide recession of the 1990’s, the sail of jeans __________ growing. A. stopped B. was stopped C. was stopping D. has stopped
8. In some countries, _________ uniforms is compulsory in schools. A. wear B. to wear C. wearing D. wore
9. Vietnamese women_________ very proud of their Ao dai. A. are B. were C. had been D. have been
10. Vietnamese women can continue_________ the unique and fashionable “Ao dai”. A. to wear B. wear C. wore D. wearing
11. Ba said he__________ some good marks last semester. A. gets B. got C. getting D. have got
12. They asked me how many children_________. A. I had B. had I C. I have D. have I
13. Thu said she had been_________ the day before. A. here B. there C. in this place D. where
14. You should practice_________ English to talk to your foreign friends. A. to speak B. speak C. spoke D. speaking
15. My friends practice__________ to the radio every day. A. listening B. are listening C. listen D. to listen
16. _____________ television is also a means of learning English. A. Watch B. Watching C. To watch D. Watched
17. You should________ a lot of grammar exercises if you want to improve your writing. A. did B. doing C. done D. do
18. Chinese is a difficult language_______________. A. to learn B. to be learnt C. to be learning D. to learning
19. The student said that the English test__________ the most difficult. A. is B. was C. will be D. have been
20. They told their parents that they______________ their best to do the test. A. try B. will try C. are trying D. would try Exercise 2: Choose the best option that best completes each sentence:
1. Don’t forget___________ your dictionary with you to class. A. to bring B. bring C. bringing D. to bringing
2. Her classmates started__________ when she won the race. A. to shout B. shouting C. shout D. shouted
3. You should remember____________ your warm clothes when it’s cold. A. to wear B. wearing C. wear D. are wearing
4. The students stopped_________ when the teacher entered the classroom. A. to talk B. talk C. talked D. talking
5. There is more population in the city_______ there is more traffic in the streets. A. and B. because C. but D. although
6. The kids didn’t go to the movie last night________ it rained so heavily. A. and B. but C. because D. although
7. ________ it’s rainy, I walk home with my umbrella. A. When B. But C. Because D. Though
8. Lan suggested________ to the zoo at weekend. A. goes B. went C. going D. to go
9. This movie is not interesting. How about_______ to the concert? A. to go B. going C. go D. went
10. You should_____ more books on UFO if you want to know about life on other planets. A. reading B. read C. to read D. have read
11. What were you doing when he_________? A. comes B. to come C. came D. coming
12. There used _______ a movie theater here, but it closed a long time ago. A. be B. to be C. being D. have been
13. He used to_______ full time, but now he is a part time worker. A. work B. working C. worked D. is working
14. Let’s__________ somewhere for a drink! A. go B. to go C. going D. went
15. She said that she___________ learning English with you. A. like B. to like C. likes D. had liked
16. She asked me where I_________ from. A. come B. coming C. to come D. came
17. She______ me whether I liked classical music or not. A. ask B. asks C. asked D. asking
18. He asked me who the editor of that book________ . A. was B. were C. is D. has been
19. He wants to know whether I_______ back tomorrow. A. come B. came C. will come D. would come
20. I wonder why he__________ love his family. A. doesn’t B. don’t C. didn’t D. hasn’t
Exercise 3: Choose the best option that best completes each sentence:
1. I remember___________ her somewhere. A. see B. seeing C. saw D. to see
2. She forgot_________ off the gas before going out. A. turn B. turning C. to turn D. turned
3. We____________ since we left school. A. don’t meet B. didn’t meet C. won’t meet D. haven’t met
4. ______________ laugh at me. A. Didn’t B. Won’t C. Don’t D. Haven’t
5. Tidal waves________ the result of an abrupt shift in the underwater movement of the Earth. A. are B. were C. is D. was
6. My friend_____________ to the museum last weekend. A. goes B. went C. had gone D. have gone
7. Thu and Lan______________ close friends for years. A. are B. were C. had been D. have been
8. Our Singaporean friends_______________ to visit our school last year. A. is coming B. come C. came D. have come
9. We_____________ Malaysia last summer. A. visited B. were visiting C. are visiting D. have visited
10. The children______________ their parents for a long time. A. didn’t see B. haven’t seen C. don’t see D. haven’t see
11. I and Kenny____________ pen pal friends since I____________ Singapore. A. are-visit B. were-visited C. have been-visited D. were-have visited
12. The kids_____________ that show before. A. didn’t see B. don’t see C. aren’t seeing D. haven’t seen
13. How long_______________ you_____________ for me?-For an hour. A. did-waited B. do-wait C. have-waited D. have-wait
14. They _____________ their friend at the airport tomorrow. A. will see B. have seen C. saw D. see
15. I ______________ English here since I graduated from university. A. teach B. taught C. have taught D. am teaching
16. Up to now, We ___________5 tests by our teacher. A. have given B. have been giving C. have been given D. is giving
17. When my younger brother was young , he usually__________ A. was crying B. cried C. has been crying D. used to cry 18. David ____________ born in London A. were B. was C. are D. is
19. Please be quiet! I _________. A. is workingB. am working C. are working D. is...used to want
20. Mary_________ from London A. came B. come C. are coming D. comes
Exercise 4: Choose the best option that best completes each sentence:
1. I _________ up at five thirty in the morning A. get B. got C. gets D. am getting
2. When my younger brother was young, he usually__________ A. was crying B. cried C. has been crying D. used to cry
3. David ____________ born after his father ___________ A. were / died B. was / died C. was / had died D. is / had died
4. When I _________ a child, I _________ to be a doctor A. was / wanted B. was / want C. was / used to want D. is / used to want
5. I_________ meet my friends and talk to relax. A. sometime B. often C. now D. next week
6. I’m preparing to support anything he ________tomorrow A. say B. says C. will say D. saying
7. My father __________ to the radio last night. A. listen B. listened C. is listening D. listens
8. My mother __________home 3 day ago. A. arrived B. arrives C. is arriving D. arriving
9. The students ________ in class yesterday. A. isn’t B. aren’t C. weren’t D. wasn’t
10. She __________ at home and did nothing last Monday. A. was staying B. stays C. stayed D. staying
11. __________ you watch a soccer match on TV last night? A. Do B. Does C. Are D. Did
12. Be careful! The dog __________. A. barks B. barking C. is barking D. are barking
13. My friend __________ married in August this year. A. gets B. getting C. will get D. get
14. –“What__________ your mother __________?” –“She is a teacher” A. do/ do B. does/ do C. is/ doing D. will/ do
15. Ba likes __________ TV every night. A. watches B. watch C. watching D. is watching
16. The weather__________ colder and colder.A. is getting B. will get C. get D. gets
17. Last night, I __________ home at half past twelve A. arrives B. arrived C. have arrived D. arrive
18. They _________ here when I was a child. A. used to live B. live C. have lived D. living
19. They__________ house the coming year. A. will build B. builds C. have built D. built
20. She _________ a cake every Sunday. A. make B. makes C. made D. have made
Exercise 5: Choose the best option that best completes each sentence:
1. She _________ a new house last week. A. buy B. bought C. have bought D. buying
2. The boys _________some letters yesterday. A. wrote B. have written C. written D. writes
3. They _________ in the river for since nine o’clock. A. swim B. swam C. have swum D. swum
4. They _________ a lot of wine at the party last night. A. drank B. drink C. have drunk D. drunk
5. She _________ her left arm last week. A. hurt B. hurting C. hurts D. to hurt
6. He _________ all his money last week. A. loses B. losing C. lost D. has lost
7. She _________ a bath two minutes ago. A. have B. has C. having D. had
8. He _________ his wallet last night. A. lose B. losing C. lost D. loosed
9. She _________ On the old chair a minute ago. A. sat B. sitting C. sits D. has sat
10. She _________ the clothes yesterday. A. washes B. wash C. washing D. washed
11. Look! Mr. Nam __________ to Ba. A. are talking B. is talking C. talking D. talks
12. The children __________ in the park at the moment. A. playing B. is play C. are playing D. plays
13. My sister __________ a dinner now. A. cooking B. is cooking C. cooks D. cook
14. Be careful! The train ________. A. comes B. come C. coming D. is coming
15. What__________ your father __________ now? A. do / do B. does / do C. is / doing D. will / do
16. Don’t disturb me! I________. A. is working B. am working C. are working D. is...used to want
17. Sometimes I_________ up before the sun rises A. get B. got C. gets D. am getting
18. Liz_________here since last year. A. have lived B. was C. has been D. lived
19. I_________ Jerry 3 days ago. A. won’t meet B. haven’t met C. hasn’t met D. didn’t meet
20. _________ your father_________ a manager in this bank since last year? A. has/been B. did/work C. was/being D. have /been
#Yumi
Choose the best answer from the four options given (marked A, B,C, or D) to complete each sentence.
6. My house_________in 1986.
A. is built B. was building C. was built D. has been built
7. The doctor_________me not to stay up too late at night.
A. advised B. suggested C. insisted D. forced
8. Tomorrow we'll go to Noi Bai Airport to meet Maryam, _________comes from Malaysia.
A. who B. whom C. whose D. that
9. His house looks very large and beautiful. It is _________house.
A. a seven-room B. a seven-rooms C. seven room D. seven rooms
10. If you get up early, you_________late.
A. weren't B. wouldn't be C. aren't D. won't be
11. It's very hot today. I wish I_________on the beach now.
A. am B. was C. were D. had been
12. When he lived in the city, he_________to the theater twice a week.
A. uses to go B. has gone C. used to go D. was going
13. My father asked us_________too much time playing computer games.
A. not to spending B. did not spend C. not to spend D. to not spent
14. Hoai can not remember the name of the restaurant_________she ate her favorite roasted duck.
A. which B. whose C. whom D. where
15. If I were a flower, I_________a sunflower.
A. was B. were C. will be D. would be
16. Nobody went to the party, _________?
A. does he B. do they C. didn’t they D. did they
17. It is nearly 3 months_________he visited his parents.
A. while B. during C. since D. when
18. _________population is another unpleasant result we have to solve.
A. Increased B. Increasing C. The increase D. To increase
19. If we_________enough time, we’ll study this exercise more carefully.
A. will have B. have C. had D. would have
20. What would you do, if you_________a UFO?
A. see B. saw C. would see D. had seen
Choose the best answer from the four options given (marked A, B,C, or D) to complete each sentence.
6. My house_________in 1986.
A. is built B. was building C. was built D. has been built
7. The doctor_________me not to stay up too late at night.
A. advised B. suggested C. insisted D. forced
8. Tomorrow we'll go to Noi Bai Airport to meet Maryam, _________comes from Malaysia.
A. who B. whom C. whose D. that
9. His house looks very large and beautiful. It is _________house.
A. a seven-room B. a seven-rooms C. seven room D. seven rooms
10. If you get up early, you_________late.
A. weren't B. wouldn't be C. aren't D. won't be
11. It's very hot today. I wish I_________on the beach now.
A. am B. was C. were D. had been
12. When he lived in the city, he_________to the theater twice a week.
A. uses to go B. has gone C. used to go D. was going
13. My father asked us_________too much time playing computer games.
A. not to spending B. did not spend C. not to spend D. to not spent
14. Hoai can not remember the name of the restaurant_________she ate her favorite roasted duck.
A. which B. whose C. whom D. where
15. If I were a flower, I_________a sunflower.
A. was B. were C. will be D. would be
16. Nobody went to the party, _________?
A. does he B. do they C. didn’t they D. did they
17. It is nearly 3 months_________he visited his parents.
A. while B. during C. since D. when
18. _________population is another unpleasant result we have to solve.
A. Increased B. Increasing C. The increase D. To increase
19. If we_________enough time, we’ll study this exercise more carefully.
A. will have B. have C. had D. would have
20. What would you do, if you_________a UFO?
A. see B. saw C. would see D. had seen
Chọn câu đúng nhất
1. Jack is……. His jokes often make his friends laugh a lot.
A. generous B. humorous C.easy-going D. unusual
2. I’m sorry. I’m not………to help you lift the table.
A. enough strong B. too strong C. strong enough D. enough strength.
3. We…….in our present house for 5 years.
A. live B. have lived C. are living D. lived.
4. We used to wash clothes by hand. Now we have a…….
A. washing machine B. dishwasher C. hair dryer D. steamer.
5. It took me a long time to get used……… glasses.
A. to wear B. to wearing C. wear D. wore.
6.The wedding party…………at the Rex Hotel.
A. is B. is being C. will be D. is going to be
7."Don’t shout", I said to Jim.
A. I told Jim don't shout B. I told to Jim not to shout
C. I told Jim not to shout D. I said to Jim don't shout.
8.The longest fish in the contest was eighteen inches long".
"It………by Thelma Rivers".
A. was catching B. caught C. was caught D. catch
9.She went to market without………. anything.
A. buy B. to buy C. bought D. buying
10.Since we have to be there by 8.30, we………. take a taxi.
A. had better B. may C. ought D. are able to
1. Jack is……. His jokes often make his friends laugh a lot.
A. generous B. humorous C.easy-going D. unusual
2. I’m sorry. I’m not………to help you lift the table.
A. enough strong B. too strong C. strong enough D. enough strength.
3. We…….in our present house for 5 years.
A. live B. have lived C. are living D. lived.
4. We used to wash clothes by hand. Now we have a…….
A. washing machine B. dishwasher C. hair dryer D. steamer.
5. It took me a long time to get used……… glasses.
A. to wear B. to wearing C. wear D. wore.
6.The wedding party…………at the Rex Hotel.
A. is B. is being C. will be D. is going to be
7."Don’t shout", I said to Jim.
A. I told Jim don't shout B. I told to Jim not to shout
C. I told Jim not to shout D. I said to Jim don't shout.
8.The longest fish in the contest was eighteen inches long".
"It………by Thelma Rivers".
A. was catching B. caught C. was caught D. catch
9.She went to market without………. anything.
A. buy B. to buy C. bought D. buying
10.Since we have to be there by 8.30, we………. take a taxi.
A. had better B. may C. ought D. are able to
III, Put in used to + V or be/ get used to + Ving. Use the verbs in brackets.
1. When I was a child. I_used to dream_(dream) of being an astronaut.
2. I’m terribly nervous. I ____didn't use to speak___ (not speak) to a large audience.
3. It took us ages to __use to living___ (live) in a block of flat.
4. A lot of trains __used to stop___ (stop) here, but now many do now.
5. Didn’t Nick ___use to work____ (work) on a building site?
6. I’ll have an orange juice, please. I ___didn't use to drink__ (not drink) alcohol.
7. David doesn’t seem to mind being in hospital. I suppose he __used to be_____ (be) there.
8. When Laura was at college, she ___used to have____ (have) a picture of Elvis Presley on her bedroom wall.
9. We ____used to live___ (live) in a small village but now we live in London.
10. I feel very full after that meal. I ___used to eat____ (eat) so much.
II, Choose the best answer to complete these following sentences.
1. My father didn’t _________ coffee for breakfast.
A. used to have B. use to have C. use to having D. use be having
2. We ________ walk past the church on our way to primary school.
A. uses to walk B. used to walking C. used to walk D. are used to walking
3. Mr. Poole has lived in Vietnam for many years. He ________the hot climate here.
A. used to B. is used to C. gets used to D. B and C are correct
4. Miss White is a nurse. She ________ working at night.
A. used to B. uses to C. is used to D. has used to
5. Precious metals such as gold, silver________ for making jewelries.
A. used to B. are used to C. is used to D. used
6. I always read books before bedtime. I ________ reading books at night.
A. am used for B. used to C. am used to D. was used to
7. He never drinks beer. He ________ drinking beer.
A. used B. isn’t used to C. used to D. isn’t used for
8. I’m from Vietnam. I _________ driving on the right.
A. use to B. used to C. am used to D. get used
9. My uncle _________ policeman when I was young.
A. used to B. used to be C. used to being D. used have been
10. Helen_________ to me very often, but now she phones.
A. used to write B. has written C. wrote D. writes
Đáp án :
II. 6c 7b 8a 9b 10b 11b 12b 13c 14b 15a
III. 16c 17b 18c
19. I was very tired and I tried keeping my eyes open but I couldn’t.
A B C D
20. They pulled the boy out of the river and tried reviving him.
A B C D
IV. Choose the word (a, b, c, or d) that best fits each of the blank spaces.
A: Wow, you don’t (21) _____ very good! Do you feel OK?
B: No, I think I’m getting a cold. What should I do (22) _____ it?
A: You (23) ____ stay at home and go to bed.
B: You’re probably right. I’ve got a really, bad cough, too.
A: Try (24) _____ some hot tea with honey. It really helps.
B: Anything (25) ____?
A: Yeah, I suggest you get a big box of (26) _____!
21. a. look b. seem c. feel d. all are correct
22. a. to b. for c. of d. of
23. a. must b. should c. ought to d. all are correct
24. a. drink b. and drink c. drinking d. to drinking
25. a. more b. different c. other d. else
26. a. bandage b. alcohol c. tissues d. eye chart
V. Read the following passage and choose the item (a, b, c, or d) that best answers each of the questions about it.
I’m in the hospital! I’ve broken my leg! But don’t worry. I’ll be all right. I’ve been here since last Sunday. I had an accident at a football match. I tried to kick the ball but I kicked the goal post! The pain was quite bad, so Dad brought me to the hospital the same day.
I had a small operation three days ago. The nurses and doctors have been eally nice, but the food’s disgusting. I prefer Mum’s cooking!
goal post (n) cột gôn operation (n) ca phẫu thuật
27. Where is the writer?
a. He’s going on a vacation. b. He’s at home.
c. He’s in the hospital. d. He’s at school.
28. What has happened to him?
a. He has had a cold. b. He has broken his leg.
c. He has had an accident. d. b & c are correct
29. He felt _____pain.
a. no b. not much c. a lot of d. a&b are correct
30. What does the word ‘disgusting’ in line 6 mean?
a. delicious b. good c. healthy d. awful
31. Which of the following is not true?
a. The writer has broken his leg because he kicked the goal post.
b. He was brought to the hospital last Sunday.
c. He doesn’t the nurses and the doctors there.
d. He had a small operation and he will be all right.
***********************************
1. Ba's village lies near the foot of a mountain and _________ the river.
A. by B. at C. next D. to
2. Many people go to my village on the weekends to have a rest after _________
A. hard working week B. a working hard week
C. a hard working week D. a hard week working
3. There is a big old banyan tree at the _________ to the village.
A. door B. gate C. chance D. entrance
4. Liz wishes she _________ Ba's village again someday.
A. can visit B. could visit C. visit D. visits
5. I had _________ to the countryside last month.
A. a two-day trip B. a two-days trip C. two-day trip D. two-days trip
6. Liz took a lot of photos _________ the trip to her parents.
A. show B. showing C. to show D. showed
7. _________ do you go to school? _ I go by bike.
A. What B. When C. How long D. How
8. What do people do _________ a living in your village?_ They plant rice and vegetables.
A. to B. with C. for D. of
9. There is a river flowing _________ my village.
A. across B. crossing C. into D. through
10. The bus stopped at a/an _________ to get some more fuel.
A. airport B. pond C. store D. gas station
11. My friends and I usually play soccer _________ Sunday afternoons.
A. on B. into C. at D. for
12. Mr. Parker grows maize on his farm. He is a _________
A. farmer B. doctor C. teacher D. worker
13. The parkers are nice, _________ van feels like a member of their family.
A. as B. because C. so D. for
14. It was a beautiful day, my friends and I went _________ a picnic to my home village.
A. to B. on C. at D. into
15. When we looked at the time, it _________ nearly 6.30 p.m.
A. is B. was C. were D. be
16. We were lucky enough _________ the last bus.
A. to catch B. catch C. caught D. catching
17. I cannot have a new bike. à I wish I _________ a new bike.
A. have B. can have C. had D. could have
18. We have a meeting _________ 8.00 and 10.15 am.
A. from B. at C. since D. between
19. We caught a bus and arrived home early _________ the morning.
A. on B. in C. at D. for
20. I was born _________ December 15th, 1992.
A. on B. in C. at D. for
Choose the best answer to complete each sentence.
1. All the sentences below use “the”, which one is correct?
A. Can you pass the sugar please? B. The crime is a problem in many big cities.
C. The apples are good for you. D. I love the skiing.
2. Our friends have lived in Ho Chi Minh city __________ 2002
A. for B. since C. in D. about
3. He prefers soccer ___________ tennis
A. from B. than C. to D. or
4. If they worked more carefully, they ___________ so many mistakes.
A. won’t make B. don’t make C. wouldn’t make D. didn’t make
5. He __________ to his friend’s party when his parents asked him to go home.
A. goes B. was going C. went D. has gone
6. There’s a strange man behind us. I think_______.
A. we are followed B. we are being followed
C. we are being following D. we are following
7. Which of the following is the strongest advice?
A. You should get a hair-cut. B. If I were you I’d get a hair-cut.
C. You ought to get a hair-cut. D. You really must get a hair-cut.
8. ________ you mind if I use your dictionary?
A. Will B. Do C. Can D. Did
9. Mr.Vo Van Kiet, ______ was our former Prime Minister, was born in Vinh Long.
A. that B. whose C. who D. whom
10. All that rubbish will have to be _____ at once.
A. get rid of B. got rid of C. got rid D. getting rid of
14. I don’t like that house. I would hate__________ there.
A. live B. living C. lived D. to have lived
15. I caught her---------- my diary.
A. reading B. read C. to read D. have read
16. They spent two months------------- their house.
A. renew B. renewed C. renewing D. to renew
17. It takes three hours----------- to Paris.
A. getting B. get C. got D. to get
18. I enjoy__________ to the park on summer evenings.
A. to go B. going C. being gone D. go
19. I don’t enjoy ----------- at by other people.
A. to laugh B. to be laughed
C. being laughed D. laughing
20. Did you come here ………….car or on foot?
A. on B. by C. in D. into
21. Sometimes I’d like__________ to play the piano.
A. to learn B. learn C. learning D. to have learned
22. The country air is fresh. .................., it is not polluted.
A. However B. Moreover C. Whenever D. Beside
23. ................ she spoke slowly, I couldn't understand her.
A. Since B. Although C. If D. As
24. He never goes to bed .................... he finishes his homework.
A. unless B. when C. while D. if
14. I don’t like that house. I would hate__________ there.
A. live B. living C. lived D. to have lived
15. I caught her---------- my diary.
A. reading B. read C. to read D. have read
16. They spent two months------------- their house.
A. renew B. renewed C. renewing D. to renew
17. It takes three hours----------- to Paris.
A. getting B. get C. got D. to get
18. I enjoy__________ to the park on summer evenings.
A. to go B. going C. being gone D. go
19. I don’t enjoy ----------- at by other people.
A. to laugh B. to be laughed C. being laughed D. laughing
20. Did you come here ………….car or on foot?
A. on B. by C. in D. into
21. Sometimes I’d like__________ to play the piano.
A. to learn B. learn C. learning D. to have learned
22. The country air is fresh. .................., it is not polluted.
A. However B. Moreover C. Whenever D. Beside
23. ................ she spoke slowly, I couldn't understand her.
A. Since B. Although C. If D. As
24. He never goes to bed .................... he finishes his homework.
A. unless B. when C. while D. if