题目内容

19. You     make any noises, for the Senior Three students are taking their monthly test.

A. cair'l      B. needn't

C. mustn't     D. won't

19.   C考査情态动词的用法。句意:你不得发出任何响声,因为高三的学生在月考。mustn't禁止,不允许。

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