Câu hỏi: Hardly did he enter the room when all the lights went out.

A. did he enter

B. when

C. the lights

D. went

Câu 1: She did not know where most of the people in the conference was from.

A. did not

B. where

C. the

D. was

Câu 2: Oxygen plays a important role in maintaining live.

A. a

B. plays

C. role

D. live

Câu 3: David, who mother is Vietnamese, speaks both Vietnamese and English fluently.

A. who

B. is

C. speaks 

D. fluently

Câu 4: The man for who the police are looking robbed the bank yesterday.

A. who

B. are

C. robbed

D. the bank

Câu 5: Optimists believe that in future we will be living in a cleaner environment, breathing fresher air and eat healthier food.

A. Optimists believe

B. in future

C. living in a cleaner

D. eat healthier food

Câu 6: I had my motorbike repair yesterday but now it still doesn’t work.

A. had

B. repair

C. but now

D. work