单项选择题

Since the road is wet this morning, ______ last night.

A．it must rain
B．it must be raining
C．it must have rained
D．it must have been rain
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单项选择题
I didn't attend the conference, but I wish I ______ there.
A．had been
B．be
C．were
D．would be
单项选择题
-- I'd met her many times before yesterday. -- So ______.
A．did I
B．had I
C．I did
D．I had
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