单项选择题

The number of cell phones ______ increased dramatically in the past few years.

A．have
B．are
C．has
D．is
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单项选择题
So many comrades ______ absent, we decided to put the meeting off.
A．are
B．to be
C．being
D．be
单项选择题
The sports meeting ______ next Saturday.
A．is to hold
B．is holding
C．holds
D．is to be held
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