I still don't know what____to him.He ought to come now.(回答时告诉我为什么 A.had happened B.was happened C.has happened D.happened

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I still don't know what____to him.He ought to come now.(回答时告诉我为什么 A.had happened B.was happened C.has happened D.happened
I still don't know what____to him.He ought to come now.(回答时告诉我为什么
A.had happened B.was happened C.has happened D.happened

I still don't know what____to him.He ought to come now.(回答时告诉我为什么 A.had happened B.was happened C.has happened D.happened
C 首先happen是不及物动词,没有被动形式,然后,主句是现在时,所以从句也一定是现在时的一种,这里现在时只有现在完成时

C是过去发生的事对现在的影响sth happen to sb某人发生某事 这个是固定搭配 我仍然不知道他发生了什么事 他现在应该来了(可他现在还没有来)