选C
因为首先工作是被完成所以要用被动语态,就可以排除A和B.
其次这个工作并没有完成所以不能现在完成时,这样就可以排除D.
the work that___ before building a bridge is to make a good design.
the work that___ before building a bridge is to make a good design.
A:must do B:is to do C：must be done Dhas been done 选什么?为什么,
A:must do B:is to do C：must be done Dhas been done 选什么?为什么,
英语人气：415 ℃时间：2020-04-17 16:21:31
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