问题描述:
at the beginning of class ,the noise of desks
at the beginning of class,the noise of desks___could be heard
A opened and cloded B to be opened and closed C being opend and closed答案是C
at the beginning of class,the noise of desks___could be heard
A opened and cloded B to be opened and closed C being opend and closed答案是C
问题解答:
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