单项选择题

I have lost one of my gloves. I ______ it somewhere.

A．must drop
B．must have dropped
C．must be dropping
D．must have been dropped
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单项选择题
______ is accepted that truth is relatively, and not absolutely true.
A．It
B．That
C．What
D．That it
单项选择题
Two men were sitting in a doctor's waiting room. What are you in here ______ asked one.
A．for
B．to
C．on
D．about
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