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

A. a

B. plays

C. role

D. live

Câu 1: Should you mind telling me the way to the nearest restaurant?

A. Should

B. telling me

C. to

D. nearest

Câu 2: The harder he tried, the worst he danced before the large audience.

A. before

B. the

C. worst

D. tried

Câu 3: There are many reasons why a particular species may become endangering.

A. endangering

B. may

C. a

D. reasons why

Câu 4: Both Mr. and Mrs. Smith are explaining the children the rules of the game.

A. Both Mr. and Mrs. Smith

B. are

C. explaining

D. the children the rules of the game

Câu 5: David, who mother is Vietnamese, speaks both Vietnamese and English fluently.

A. who

B. is

C. speaks 

D. fluently

Câu 6: Most of the houses on the street was built in the previous century.

A. of

B. on

C. previous

D. was