题目内容
I don’t know _____.
- A.what happened to him
- B.what did he happen
- C.what he happened
- D.what was the matter
A
what happened to sb,表示某人怎么了,可以做know 的宾语,故选A
what happened to sb,表示某人怎么了,可以做know 的宾语,故选A
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