1 . One of the key reasons behind this is that ______ a book usually takes a few days to read, a movie typically lasts under two hours.

A．while

B．if

C．because

D．for

2 . I come here not just return the book, ________ to express thanks. (用适当的词填空)

3 . We should help him ________(而不是) he should help us.(根据汉语提示完成句子)

4 . If Thando is not in the classroom, he is either in the library_________ in the computer lab.(用适当的词填空)

5 . Not only do they need money_________ also they are short of care. (用适当的词填空)

6 . We cannot accept a society _____ the rich enjoy comfort _____ the poor have to suffer.

A．which; while

B．where; while

C．that; which

D．where; that

8 . He had ________ the time ________ the intention to think of other things. He was focusing all his attention on the research at that time.

A．both; and	B．not only; but also
C．neither; nor	D．either; or

9 . I was doing my homework ________ it suddenly rained.

A．and

B．while

C．then

D．when

10 . I have chosen two courses, and ___________ are of great importance.

A．both of which

B．either of which

C．both of them

D．all of which