题目内容
It ___ to be raining when we went to see him off at a railway station.
- A.happened
- B.had happened
- C.took place
- D.took
A
happen to (be/to)意为:恰巧,碰巧,不可用had happened to be/do.
happen to (be/to)意为:恰巧,碰巧,不可用had happened to be/do.
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