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

A. a

B. plays

C. role

D. live

Câu 1: My father asked me where had I gone the night before.

A. asked

B. the 

C. before

D. had I

Câu 2: The director, as well as his wife and two children, were injured in the accident.

A. the

B. well

C. were

D. in

Câu 3: Publishing in the UK, the book has won a number of awards in recent regional book fairs.

A. publishing

B. has won

C. in

D. book fairs

Câu 4: 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 5: Hardly did he enter the room when all the lights went out.

A. did he enter

B. when

C. the lights

D. went

Câu 6: There are many reasons why a particular species may become endangering.

A. endangering

B. may

C. a

D. reasons why