题目内容

15、

In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.

A. signal        B. chance          C. mark            D. measure

 

 

试题答案

15、A.

解析: 考查名词。根据句意可知打铃及老师合上书本,这是下课的暗示,选项中只能选择signal。chance“机会”,mark“分数,痕迹”,measure“方法,措施”。

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