单项选择题

We were talking about the American tourists _________ we met during our trip to the Great Wall.

A．what
B．which
C．whom
D．whose
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单项选择题
I wrote it down _________ I should forget it.
A．in case
B．in case of
C．in order that
D．for fear of
单项选择题
If it rains, we should not go out, but the sky _________ perfectly clear.
A．is
B．will be
C．was
D．had been
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