单项选择题

Cell phones can make our life ______.

A．easier
B．busy
C．fast
D．uncomfortable
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单项选择题
If people leave their phones at home, they will ______.
A．feel at a loss
B．be connected to the Internet
C．have some unexpected problems
D．check their e-mail
单项选择题
Barbara did not have time to go to the concert last night because she was busy ______ for her lecture.
A．to preparing
B．to be prepared
C．preparing
D．being prepared
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