3.Mary,you must get your room___today after school.

问题描述:

3.Mary,you must get your room___today after school.
A.cleaned B.clearing
C.to clean D.to be cleaned
可是答案是A,WHY?
d为何不可,事情还未发生

我觉得要选择A,这是一个表示命令的句子吧,get something done 是固定的用法哈