Câu hỏi: It is vitally important that she takes this medication night and morning.

A. vitally

B. that

C. takes

D. medication

Câu 1: The longer the children waited in the long queue, the more impatiently they became

A. the longer

B. waited

C. the long queue

D. impatiently

Câu 2: Regarding as one of the leading figures in the development of the short story, O Henry is the author of many well- known American novels.

A. Regarding as

B. leading figures

C. the

D. novels

Câu 3: What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population.

A. What we know

B. are

C. from spreading

D. among

Câu 4: The grass needs cutting, so let us have one of the men to take lawn-mower and do it.

A. needs

B. cutting

C. let

D. to take

Câu 5: Those who had already purchased tickets were instructed to go to gate first immediately.

A. Those

B. had already purchased

C. gate first

D. immediately

Câu 6: Some species of bats are dormant each days and active every night.

A. species of

B. each days

C. every night 

D. are dormant