The students gradually ______ a knowledge of the subject

本文约有137个文字，预计阅读时间需要1分钟。

The students gradually ______ a knowledge of the subject

1. The students gradually ______ a knowledge of the subject.

A.acquired

B.attained

C.achieved

D.behaves

.标准答案：A

2. She ought to stop work; she has a headache because she _______ too long.

A.has been reading

B.had been reading

C.is reading

D.reads

.标准答案：A

3. The people in the flood areas are badly in ______ of warm clothes and shelter.

A.shortage

B.want

C.supply

D.plentiful

.标准答案：B