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3 tháng 10 2018

1 Most students are frightened of speaking a foreign language.

Speaking a foreign language is__a fear of most students__

2 The meeting was so boring that I almost fell asleep.

I __wasn't so interested by the meeting__ that I almost fell asleep

3 The teacher found her pupils' exam results disappointing.

The teacher was___disappointed about____her pupils' exam results

4 I was confused because the instructions were only in Spanish.

The instructions____made me confused___because they were only in Spanish

5 Sahra has worked at the sports center for two months.

Sarah___started working at the sports center​ __two months ago.

6 We had never been to the park before.

It was___the first time_ we had been to the park

7 When we evntually arrived at the party, all the food had been eaten.

By __the time we arrived at_the party , all the food had been eaten.

8 He put everything back in its place before he left.

He didn't___leave until he put___everything back in its place.

23 tháng 11 2020

1. Most students are frightened of speaking a foreign language.

\(\rightarrow\)Speaking a foreign language is____a fear of most students____.

2. The meeting was so boring that I almost fell asleep.

\(\rightarrow\)I____wasn't so interested by the meeting____that I almost fell asleep

3. The teacher found her pupils' exam results disappointing.

\(\rightarrow\)The teacher was____disappointed about____her pupils' exam results

4. I was confused because the instructions were only in Spanish.

\(\rightarrow\)The instructions____made me confused____because they were only in Spanish

5. Sahra has worked at the sports center for two months.

\(\rightarrow\)Sarah____started working at the sports center____two months ago.

6. We had never been to the park before.

\(\rightarrow\)It was____the first time____we had been to the park

7. When we evntually arrived at the party, all the food had been eaten.

\(\rightarrow\)By____the time we arrived at____the party, all the food had been eaten.

8. He put everything back in its place before he left.

\(\rightarrow\)He didn't____leave until he put____everything back in its place.

B. USING THE PRESENT CONTINUOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE 1. I am cleaning my room -> my mom 2. they are rebuilding the damaged museum -> the damaged museum 3. my mother is not preparing the dinner in the kitchen -> the dinner 4. mary is performing magic tricks at Tom's party -> magic tricks 5. she is decorating her house with many flowers -> her house 6. i'm reading a famous novel named Gone with the wind -> a famous novel 7. are they washing his car at the...
Đọc tiếp

B. USING THE PRESENT CONTINUOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. I am cleaning my room
-> my mom
2. they are rebuilding the damaged museum
-> the damaged museum
3. my mother is not preparing the dinner in the kitchen
-> the dinner
4. mary is performing magic tricks at Tom's party
-> magic tricks
5. she is decorating her house with many flowers
-> her house
6. i'm reading a famous novel named Gone with the wind
-> a famous novel
7. are they washing his car at the garage
-> his car
8. the chairman of the comapny is presenting the annual report in the meeting room
-> the annual report
9. the zoo keeper is not feeding those dangerous tigers
-> those dangerous tigers
10. is he watering the trees in the garden
-> the trees

c. Using the present perfect tense REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. no one has used this washing machine for ages
-> this washing machine
2. he has opened his own restaurant in distric 1
-> his own restaurant
3. she has cut her hair
-> her hair
4. my sister has sliced the beef and put it into refrigerator
-> the beef
5. ourr company has displayed the new car model
- the new car model
6. they have sent some elephants to the zoo
-> some elephants
7. people have said that he has moved his house to Italy
-> he
8. have you ever told Alan's story to her mother
-> alan's story
9/ i haven't eaten snails before
->snails
10. they've invited Mr. Brown to speak at the conference
- Mr. brown

E. USING THE PAST CONTINOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. Julie was making pancakes in the kitchen
-> Pancakes
2. i was helping my little brother with his homework
-> my little brother
3. my mother was growing some flowers in the garden
-> some flowers
4. what was he writing on the desk
-> what was
5. the boy was throwing the snowball
-> the snowball
6. nobody was watching tv when we arrived
-> tv
7. why were you picking the leaves
->why
8. was she reading the magazine when the phone rang
-> the magazine
9. mrs. smith was expecting her son to come back
-> mrs. smith's son
10. we weren't painting the gate
-> the gate

F. using the past perfect REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. i had lost the key
- the key
2. the little girl had broken the Chinese pot
-> the Chinese pot
3/ the americans had discovered another planet
-> another planet
4. firefighters had put out the fire successfully
-> the fire
5. the manager hadn't accepted my resighnation letter
-> my resignation letter
6. had peter found the solutions to these problems
-> the solution
7.he had given an interesting book to me
-> an interesting book
8. when i got home, i realized that someone had stolen my car
-> when i got home, i realized that my car
9. they hadd raised many pigs and chickens on theirs farm
- many pigs and chickens
10. the scientists had placed the chemical in the test tube
-> the chemical

2
4 tháng 2 2018

-Nhiều quá à...Làm giúp bạn một vài phần thôi,còn lại xem lại công thức nhé....

B. USING THE PRESENT CONTINUOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. I am cleaning my room
-> my room is being cleaned .
2. they are rebuilding the damaged museum
-> the damaged museum is being rebuilt.
3. my mother is not preparing the dinner in the kitchen
-> the dinner isn't being prepared in the kitchen by my mother.
4. mary is performing magic tricks at Tom's party
-> magic tricks are being performed at Tom's party by mary.
5. she is decorating her house with many flowers
-> her house is being decorated with many flowers
6. i'm reading a famous novel named Gone with the wind
-> a famous novel is being read named Gone with the wind
7. are they washing his car at the garage?
->Is his car being washed at the garage?
8. the chairman of the comapny is presenting the annual report in the meeting room
-> the annual report is being presented in the meeting room by the chairman of the company
9. the zoo keeper is not feeding those dangerous tigers
-> those dangerous tigers aren't being fed by the zoo keeper.
10. is he watering the trees in the garden?
-> Are the trees being watered?

Phần còn lại nhìn công thức nha bạn.

4 tháng 2 2018

B. USING THE PRESENT CONTINUOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. I am cleaning my room
-> my mom is being cleaned
2. they are rebuilding the damaged museum
-> the damaged museum is being rebuilt.
3. my mother is not preparing the dinner in the kitchen
-> the dinner is not being prepared in the kitchen by my mother.
4. mary is performing magic tricks at Tom's party
-> magic tricks are being performed at Tom's party by Mary.
5. she is decorating her house with many flowers
-> her house is being decorated with many flowers
6. i'm reading a famous novel named Gone with the wind
-> a famous novel named Gone with the wind is being read.
7. are they washing his car at the garage
-> his car is being washed at the garage.
8. the chairman of the comapny is presenting the annual report in the meeting room
-> the annual report is being presented in the meeting room by the chairman of the company.
9. the zoo keeper is not feeding those dangerous tigers
-> those dangerous tigers are not being fed by the zoo keeper.
10. is he watering the trees in the garden
-> the trees are being watered in the garden.

c. Using the present perfect tense REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. no one has used this washing machine for ages
-> this washing machine hasn't been used for ages
2. he has opened his own restaurant in distric 1
-> his own restaurant in district has been opened.
3. she has cut her hair
-> her hair has been cut.
4. my sister has sliced the beef and put it into refrigerator
-> the beef has been sliced and put into refrigerator by my sister.
5. ourr company has displayed the new car model
- the new car model has been displayed by our company.
6. they have sent some elephants to the zoo
-> some elephants have been sent to the zoo
7. people have said that he has moved his house to Italy
-> he has been said to have moved his house to Italy.
8. have you ever told Alan's story to her mother
-> has alan's story been told to her mother?
9/ i haven't eaten snails before
->snails haven't been eaten before.
10. they've invited Mr. Brown to speak at the conference
- Mr. brown has been invited to speak at the conference.

E. USING THE PAST CONTINOUS REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. Julie was making pancakes in the kitchen
-> Pancakes were being made in the kitchen by Julie.
2. i was helping my little brother with his homework
-> my little brother was being helped with his homework
3. my mother was growing some flowers in the garden
-> some flowers were being grown in the garden by my mother.
4. what was he writing on the desk
-> what was being written on the desk?
5. the boy was throwing the snowball
-> the snowball was being thrown by the boy.
6. nobody was watching tv when we arrived
-> tv wasn't being watched when we arrived
7. why were you picking the leaves
->why were the leaves being picked ?
8. was she reading the magazine when the phone rang
-> Was the magazine being read when the phone rang?
9. mrs. smith was expecting her son to come back
-> mrs. smith's son was being expected to come back.
10. we weren't painting the gate
-> the gate wasn't being painted

F. using the past perfect REWRITE THE FOLLOWING SENTENCE WITH THE FORM OF PASSIVE
1. i had lost the key
- the key had been lost.
2. the little girl had broken the Chinese pot
-> the Chinese pot had been broken by the little girl.
3/ the americans had discovered another planet
-> another planet had been discovered by the Americans.
4. firefighters had put out the fire successfully
-> the fire had been put out successfully by firefighters.
5. the manager hadn't accepted my resighnation letter
-> my resignation letter hadn't been accepted by the manger.
6. had peter found the solutions to these problems
-> Had the solutions to these problems been found by Peter?
7.he had given an interesting book to me
-> an interesting book had been given to me
8. when i got home, i realized that someone had stolen my car
-> when i got home, i realized that my car had been stolen
9. they hadd raised many pigs and chickens on theirs farm
- many pigs and chickens on their farm had been raised
10. the scientists had placed the chemical in the test tube
-> the chemical in the test tube had been placed by the scientists.

24 tháng 2 2023

1. We had the permission from our head teacher to grow a Bee Garden at the school garden. -> Our head teacher permitted us to grow a Bee Garden at the school garden

2. Joe planted some trees for the local park last Sunday, and he will never forget that moment. ->Joe will remember the moment when he planted some trees for the local park last Sunday

I. Error identification & correct (xác định và sửa lỗi sai) Example: It’s difficult getting there on time in rush hour. getting → to get 1. He does his homework at the moment. 2. He is learning cooking at the moment. 3. What do you usually do at your free time? 4. You should practise speak English before you go to England. 5. She is very good of writing essays. 6. I am really not interested of going to high school. 7. He thanks her about inviting him to the party. 8. They don’t go to...
Đọc tiếp

I. Error identification & correct (xác định và sửa lỗi sai)
Example: It’s difficult getting there on time in rush hour.
getting → to get
1. He does his homework at the moment.
2. He is learning cooking at the moment.
3. What do you usually do at your free time?
4. You should practise speak English before you go to England.
5. She is very good of writing essays.
6. I am really not interested of going to high school.
7. He thanks her about inviting him to the party.
8. They don’t go to the swimming pool because the rain.
9. They don’t go to the swimming pool because the rain.
10. Would you like going to a pop concert this weekend.
II. Complete the sentences with​​ although/ in spite of/ because/ because of.
1.​​ ............​​ ​​ the meeting's at 2.00, I won't be able to see you.
2.​​ ............​​ I told the absolute truth, no one would believe me.
3. The goods were never delivered............​​ ​​ the promise we had received.
4. My mother is always complaining................ the untidiness of my room.
5. I didn't get the job............​​ I had all the necessary qualifications.
6. It's unsafe to travel in that country​​ ............​​ the ongoing civil war.
7. The villagers refused to leave.................. the drought.
8.​​ ............​​ ​​ everything looked different, I had no idea where to go.
9. ............... his age, John was not hired ...................he had the necessary
qualifications.
10. You can't enter this secure area​​ ............​​ you don't have an official permit.

1
22 tháng 4 2020

I. Error identification & correct (xác định và sửa lỗi sai)
Example: It’s difficult getting there on time in rush hour.
getting → to get
1. He does his homework at the moment. -> is doing
2. He is learning cooking at the moment. -> to cook
3. What do you usually do at your free time? -> in
4. You should practise speak English before you go to England. -> speaking
5. She is very good of writing essays. -> at
6. I am really not interested of going to high school. -> in
7. He thanks her about inviting him to the party. -> for
8. They don’t go to the swimming pool because the rain. -> because of
9. They don’t go to the swimming pool because the rain. -> because of
10. Would you like going to a pop concert this weekend. -> to go
II. Complete the sentences with​​ although/ in spite of/ because/ because of.
1.​​ because​​ ​​the meeting's at 2.00, I won't be able to see you.
2.​​ although I told the absolute truth, no one would believe me.
3. The goods were never delivered in spite of the promise we had received.
4. My mother is always complaining because of the untidiness of my room.
5. I didn't get the job although I had all the necessary qualifications.
6. It's unsafe to travel in that country​​ because of the ongoing civil war.
7. The villagers refused to leave in spite of the drought.
8.​​ because​​ everything looked different, I had no idea where to go.
9. because of his age, John was not hired although he had the necessary
qualifications.
10. You can't enter this secure area​​ because​​ you don't have an official permit.

1. They gave him a big present when he retired 2. They didn't tell me all the details of the case 3. People took him to hospital in an ambulance 4. Why didn't they help her? 5. Our class will you hold a meeting before May Day 6. Will you invite her to your wedding party? 7. Someome will tell hin that news 8. What will the goverment do for the poor? 9. They are painting the kitchen now 10. Mary is cutting the cake with a sharp knife 11. She isn't cooking dinner now 12. Where is he...
Đọc tiếp

1. They gave him a big present when he retired

2. They didn't tell me all the details of the case

3. People took him to hospital in an ambulance

4. Why didn't they help her?

5. Our class will you hold a meeting before May Day

6. Will you invite her to your wedding party?

7. Someome will tell hin that news

8. What will the goverment do for the poor?

9. They are painting the kitchen now

10. Mary is cutting the cake with a sharp knife

11. She isn't cooking dinner now

12. Where is he reparing his bicycle?

13. She was doing her homework at this time yesterday

14. I was cleaning the house when he came

15. Where was she singing English songs at this time last Sunday

16. Somebody has taken some of my books away

17. Nobody has ever treated me with such kindness

18. Have they changed the windows of the lab?

19. How long have she waited for that doctor?

20. We had had dinner before 8 pm yesterday

21. Had they built this house by the end of last year?

22. He had sent many reports to that company

23. The waitress will have brought the coffee to you

24. The children will have eaten a lot of ice cream by the time the party is over

25. How sis the police find the lost man?

2
28 tháng 10 2019

1. He was given a big present when he retired

2. I wasn't told all the details of the case

3. He was taken to the hospital in an ambulance

4. Why she wasn't helped ?

5. A meeting will be held by our class before May Day

6. Will she be invited to your wedding party ?

7. He will be told that news

8. What will the poor be done by the government ?

9. The kitchen is being painted now

10. The cake is being cut with a sharp knife by Mary

11. Dinner isn't be cooked by her now

12. Where is his bicycle repaired ?

13. Her homework was being done by her at this time yesterday

14. The house was being cleaned by me when he came

15. Where were English songs being sung by her at this time last Sunday ?

16. Some of my books have been taken away

17. I haven't ever been treated with such kindness

18. Have the windows of the lab been changed ?

19. How long that doctor has been waited for by her ?

20. Dinner had been had by us before 8 p.m yesterday

21. Had this house been built by the end of last year ?

22. Many reports had been sent to that company by him

23. You will have been brought the coffee by the waitress

24. A lot of ice-cream will have been eaten by the children by the time the party is over

25. How was the lost man found by the police ?

27 tháng 10 2019

Dạ đề bài là chuyển các câu sang câu bị động ạ

30 tháng 11 2017

Giúp mình câu này với

put the correct verb

1 They had sold all the books when we (get) .......got........there

2 John (watch) ...was watching......TV at 8 last evening

3 He (do)......had done......his homework before he went to the cinema

4 Yester day the police (report).......reported.........that they (capture)............had captured...........the thife

5 My friend (thank)........thanked.........me for what i had done for him

6 They (go) ........went........ home after they (finish).......had finished.........their work

7 she (win).......won........the gold medal in 1986

8 What were you (do) ......doing.... at 6 p.m Yesterday ?

24 tháng 11 2018

Complete the sentences with although/ in spite of/ because/ because of

1. ______although_____ the meeting's at 2.00, I won't be late to see you

2. _____although____ I told the absolute truth, no one would believe me

3. The goods were never delivered ____in spite of_____ the promise we had received

4. My mother is always complaining ____because of_____ the untidiness of my room

5. I didn't get the job ___although_____ I had all the necessary qualifications

6. Sarah can't climb up the tree ____because of______ her fear of heights

7. ______because of____ his age, John was not hired ____although________ he had the necessary qualifications

8. ______in spite of_____ having a bad cough, she was able to sing in the choir

9. The villagers refused to leave ___in spite of_______ the drought

10. ____because_____ everything looked different, I had no idea where to go

24 tháng 11 2018

Complete the sentences with although/ in spite of/ because/ because of

1. ______because_____ the meeting's at 2.00, I won't be late to see you

2. _____although____ I told the absolute truth, no one would believe me

3. The goods were never delivered ___because______ the promise we had received

4. My mother is always complaining ____because of_____ the untidiness of my room

5. I didn't get the job ___although_____ I had all the necessary qualifications

6. Sarah can't climb up the tree _____because of_____ her fear of heights

7. ____because of______ his age, John was not hired _______although_____ he had the necessary qualifications

8. _____in spite of______ having a bad cough, she was able to sing in the choir

9. The villagers refused to leave _____in spite of_____ the drought

10. ____although_____ everything looked different, I had no idea where to go

1. Most students are frightened of speaking a foreign language -> Speaking a foreign language is....................................... 2. The meeting was so boring that I almost fell asleep -> I.....................................that I almost fell asleep 3. The teacher found her pupil's exam results disappointing -> The teacher was........................................... her pupil's exam results 4. I was confused because the intructions were only in Spainish -> The...
Đọc tiếp

1. Most students are frightened of speaking a foreign language

-> Speaking a foreign language is.......................................

2. The meeting was so boring that I almost fell asleep

-> I.....................................that I almost fell asleep

3. The teacher found her pupil's exam results disappointing

-> The teacher was........................................... her pupil's exam results

4. I was confused because the intructions were only in Spainish

-> The instructions....................................because they were only in spanish

5. Sarah has worked at the sports centre for 2 months

-> Sarah....................................................2 months ago

6. We has never have been to the park before

->I was.........................................we had been to the park

7. When we eventually arrived at the party, all the food had been eaten

-> By............................................the party, all the food had been eaten

8. He put everything back in its place before he left

-> He didn't...............................................everything back in its place

9. Willian cooked this delicious dinner himself

-> Willian cooked.............................own

10. Does the project interest you?

-> Are you......................................the project

1
8 tháng 11 2018

1. Most students are frightened of speaking a foreign language

-> Speaking a foreign language frightens Most students.......................................

2. The meeting was so boring that I almost fell asleep

-> I......was so boring with the meeting...............................that I almost fell asleep

3. The teacher found her pupil's exam results disappointing

-> The teacher was.............disappointed in.............................. her pupil's exam results

4. I was confused because the intructions were only in Spainish

-> The instructions......confuse me..............................because they were only in spanish

5. Sarah has worked at the sports centre for 2 months

-> Sarah.........began to work at the sports centre ...........................................2 months ago

6. We has never have been to the park before

->It was the first time.........................................we had been to the park

10. Does the project interest you?

-> Are you........interested in..............................the project

PRATICE 1. when alice ___ into the fridge, all the food had gone a. is looking b. looks c. looked d. was looked 2. i ___ tom and ann at the airport a few weeks ago a. have meet b. had met c. met c. was met 3. before Jennifer won the lottery, she __ any kind of the contest a. hasn;t entered b. doesn't enter c. wasn't entering d. hadn't entered 4. My father __ me to the zoo when i was a child a. has taken b. is taking c. took d. takes 5. by the time we arrived at the hall, the lecturer ___ halff...
Đọc tiếp

PRATICE
1. when alice ___ into the fridge, all the food had gone
a. is looking b. looks c. looked d. was looked
2. i ___ tom and ann at the airport a few weeks ago
a. have meet b. had met c. met c. was met
3. before Jennifer won the lottery, she __ any kind of the contest
a. hasn;t entered b. doesn't enter c. wasn't entering d. hadn't entered
4. My father __ me to the zoo when i was a child
a. has taken b. is taking c. took d. takes
5. by the time we arrived at the hall, the lecturer ___ halff of his speech
a. made b. had made c. is making d. will make
6. yesterday, i came back home late, and then i ___ a shower
a. took. b. was taking c. had taken d. would take
7. the police ___ them a lot of questions before they released them
a. has asked b.ask c. had asked d. would ask
8. my brother ___ in the army from 1980 to 1983
a. is serving b. serves c. served d. has served
9. after the thieves ___ into this big building they went into the dining room and took some valuable things away
a. entered b. had entered c. were entering d. had been entering
10. we ____ Dorothy since last saturday
a. don't see b. haven't seen c. didn't see d. hadn't seen
11. the train ___ half an hour ago
a. has been leaving b. left c. has left d. had left
12. christopher Columbus ___ american more than 500 year ago
a. discovered b. has discovered c. had discovered d. had been discovering
13. the man got out of the car, ___ round to the back and opened the book
a. walking b. walked c. walks d. walk
14. i have never played badminton before. this is the first time i ___ to play
a. try b. tried c. have tried d. am trying
15. since____, i have heard nothing from him
a. he had left b. he left c. he has left d. he was left

II use the corect form of the verbs in the parenthese
1. i hope ___(have ) a job
2. try to avoid (make)___ him angry
3. he is thinking of (leave)____ his job
4. please let me (know) ___ your decision
5. it's no use (wait)____
6. i hate (see)____ a child cry
7. it's difficult (get)____ used to getting up early
8. stop (argue)____ and star (work)____
9. i'd like (have)_____ a look at your new car
10. i'm looking forward (see) ___ you again
11. would you mind (not touch)___ the wire
12. i'm sorry (disappoint)____ you
13. he told me ( sign)____ a paper admitting his guilt
14. i don't enjoy (go)____ to the dentist
15. i forget (meet) ___you
16. don't forget (give)_____ her my regards
17/ he promised (not go)____ to school late
18/ they practise (speak) english every day
19. the teacher asked us (write)_____ the exercises
20. my father gave up (smoke) 12 years ago
21. she refused (answer) ____ my question
22. he suggests (go)___ on a trip
23. they agree (camp) ___ in that field
24. they didn't want me (buy) that old house
25. the doctor advised me ( do) exercise every morning

REWRITE
1. shall we invite our friends on sundays
-> do you consider
2. would you please give me a hand
- would you mind
3. why don't we stay at home for a change
- i suggest
4. shall we go for a ride
- what about
5. asking him for help is useless
-It's no use
6. we expect to meet them again
- we look forward
7. it's not a good idea to travel during the rush hour
- it's better to avoid

pratice
1. although tom was a poor student, he studied very well
- In spite of
2. mary could not go to school because she was sick
- because of
3. tom was admitted to the university although his grades were bad
- despite
4. because there was a big storm, i stayed at home
because of
5. because the weather is cold, the crops are late this year
- because
6. though he didn't earn enough money, he bought that house
- in spite of

1
11 tháng 12 2017

1. when alice ___ into the fridge, all the food had gone
a. is looking b. looks c. looked d. was looked
2. i ___ tom and ann at the airport a few weeks ago
a. have meet b. had met c. met c. was met
3. before Jennifer won the lottery, she __ any kind of the contest
a. hasn;t entered b. doesn't enter c. wasn't entering d. hadn't entered
4. My father __ me to the zoo when i was a child
a. has taken b. is taking c. took d. takes
5. by the time we arrived at the hall, the lecturer ___ halff of his speech
a. made b. had made c. is making d. will make
6. yesterday, i came back home late, and then i ___ a shower
a. took. b. was taking c. had taken d. would take
7. the police ___ them a lot of questions before they released them
a. has asked b.ask c. had asked d. would ask
8. my brother ___ in the army from 1980 to 1983
a. is serving b. serves c. served d. has served
9. after the thieves ___ into this big building they went into the dining room and took some valuable things away
a. entered b. had entered c. were entering d. had been entering
10. we ____ Dorothy since last saturday
a. don't see b. haven't seen c. didn't see d. hadn't seen
11. the train ___ half an hour ago
a. has been leaving b. left c. has left d. had left
12. christopher Columbus ___ american more than 500 year ago
a. discovered b. has discovered c. had discovered d. had been discovering
13. the man got out of the car, ___ round to the back and opened the book
a. walking b. walked c. walks d. walk
14. i have never played badminton before. this is the first time i ___ to play
a. try b. tried c. have tried d. am trying
15. since____, i have heard nothing from him
a. he had left b. he left c. he has left d. he was left