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 谁帮忙解释一下?谢谢啦!
问题描述：
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 谁帮忙解释一下?谢谢啦!
答
B TO BE表示作用或者目的
A DESKS是被OPEN和被CLOSE,A用的是主动
所以是C,被动态
答
这里强调了时间，那上课开始时，就那时，所以用进行时
答
being opened and closed是正在被开或关的意思
A答案没有时态只是表达被动,B答案是将要的意思,先让以后发生的响声是不能被听到的,所地答案是C