BV

1. I _______ for a very long time, so I _______ very angry with them.

A. had been waiting - was

B. have been waiting - was

C. have waited - was

D. have been waiting – am

2. I'm sad to think that all my plants _____ by the time I _______ from holiday. A. will die - return

B. died - returned

C. may have died - have returned

D. had died - could return

3.Though world food production ________ since 1950 people still ________ from shortages in various parts of the world.

A. has been doubing - may be suffering

B. has doubled - suffer

C. had been doubled - could be suffering

D. has been doubled – suffers

4. For several years now she _______ as private secrectary to the bank manager.

A. worked

B. has been working

C. was working

D. works 

5. In the past 50 years, that country _______ through 15 consitutions, I8 coups and 21 prime ministers.

A. has been going

B. goes

C. were going

D. has gone

6. She was still working a eight o'clock yesterday evening.

She _______ since six o'clock in the morning.

A. has worked

B. has been working

C. worked

D. had been working

Giải thích giúp luôn ạ

KY
19 tháng 7 2021 lúc 7:31

1. I _______ for a very long time, so I _______ very angry with them.

A. had been waiting - was

B. have been waiting - was

C. have waited - was

D. have been waiting – am

2. I'm sad to think that all my plants _____ by the time I _______ from holiday. A. will die - return

B. died - returned

C. may have died - have returned

D. had died - could return

3.Though world food production ________ since 1950 people still ________ from shortages in various parts of the world.

A. has been doubing - may be suffering

B. has doubled - suffer

C. had been doubled - could be suffering

D. has been doubled – suffers

4. For several years now she _______ as private secrectary to the bank manager.

A. worked

B. has been working

C. was working

D. works 

5. In the past 50 years, that country _______ through 15 consitutions, I8 coups and 21 prime ministers.

A. has been going

B. goes

C. were going

D. has gone

6. She was still working a eight o'clock yesterday evening.

She _______ since six o'clock in the morning.

A. has worked

B. has been working

C. worked

 

D. had been working

 

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