Question

【题目】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

Answer 1

【答案】A

【解析】

试题分析：考查名词。句意：在我们的课堂上，当铃声响起来并且老师合上书本时，就是每个人都会站起来的信号。A. Signal信号 ；B. chance机会；C. mark 标记；D. Measure测量；根据句意可知，这是一个信号，故选A项。