单项选择题

Please come to my home ______ you are free tomorrow.

A．so
B．or
C．if
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单项选择题
She forgot to tell me which bus to ______.
A．travel
B．take
C．go
单项选择题
I've been waiting for him for ______ hour and ______ half.
A．a.../
B．an... a
C．an.../
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