单项选择题

He ______ get up at five o'clock in the morning.

A．used to
B．is used m
C．has been used to
D．has used to
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单项选择题
Bob takes great pride ______ having passed the entrance examination.
A．at
B．on
C．in
D．with
单项选择题
Only in this way ______ this difficult math problem.
A．we can solve
B．can we solve
C．do we solve
D．we will solve
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