1.We mustn'trelax our vigilance___.

A in the leastB at leastC at mostD in the end

2. During the reading lesson, the teacher asked the students to read a few __ from the novel.

ApiecesBessaysC fragmentsD extracts

3. But they aslo __ beyond the individual places and consider the earth as a whole.

A passB reachC goD set

4. How human beings and their environment act __ each other.

A uponB forC asD to

5. The mere fact __ most people believe nuclear war would be madness does not mean that it will not occur.

AwhatB whichC thatD why

答案：

1-5ADCAC

1．选A ① in the least 丝毫，一点They don’t in least understand this.
②in the end 最后，终于
In the end they reached their destination before dusk.
③at least至少
④at most至多

2．选D ① extract 做节录，引文，选段
He applied to the publisher for permission to reprint an extract.
②fragment 碎片，断片，（文艺作品等的）残存部分
Liberty and civilization are only fragments of rights wrung from the strong hands of wealth and book learning.
③essay 散文，小品文，随笔，短文，评论

3．选C go beyond超过，超出 These issues go beyond the range of language study. 而set和pass，reach不与beyond搭配。

4．选A ①act upon作用于 This drug act upon (on) the nerves.
②act as 作为……而作出反应，充当
His job was to act as a link between the government and the press.
③work at从事 She had been wondering what she should work at in order to gain her doctorate.

5．选C 从句子结构来看，fact后接的是同位语从句。