问题
选择题
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
答案
答案：A
happen to (be/to)意为:恰巧,碰巧,不可用had happened to be/do.
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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
答案：A
happen to (be/to)意为:恰巧,碰巧,不可用had happened to be/do.