2. 外语
  3. We must ______ that the experiments are carried out as rigidly as possible.

We must ______ that the experiments are carried out as rigidly as possible.

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问题 We must ______ that the experiments are carried out as rigidly as possible.
选项 A、ensure
B、assure
C、insure
D、secure
答案A
解析 题意是：我们必须______这些实验尽可能严格地进行控制。[A]ensure“确保，保证”，指使某事或某种行为的结果得到保证，符合题意。[B]assure“向…保证”，目的是解除他人心里的怀疑或担心；[C]insure“担保，保险”，是对意外事故、财产损失等情况承担保险；[D]secure“保证，担保”，是指为借款等作保或向债权人提供保证。因此，这三项都不符合题意。
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大学英语四级

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