单项选择题

He heard someone ______ him, so he stopped to have a look.

A．calls
B．call
C．calling
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单项选择题
-- Have you ______ Beijing before--Not Yet.
A．gone to
B．been to
C．been in
单项选择题
Nobody but Mr. Lee and his wife ______ come.
A．have
B．has
C．is
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