We asked them what ——in the street

问题描述:

We asked them what ——in the street
A,going on B happened C taken place D happen
请问选什么?原因是什么?
We asked them what was ——in the street
对不起,出错了

选B.原因如下:
A不对,少了助动词was
C不对,同样少助动词
D不对,因为前半句是过去时,根据前后时态一致的原则,所以选B.