问题描述:
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
求详解,主要是判断一下A、C.谢蛤~
A.signal B.chance C.mark D.measure
求详解,主要是判断一下A、C.谢蛤~
问题解答:
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