单项选择题

I know. But sometimes it is ______ it.

A．hard to not do
B．hard not to do
C．not hard to do
D．hard not doing
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单项选择题
Not only ______ me, but they hadn't done a very good repair job either.
A．did the garage overcharge
B．the garage overcharged
C．did overcharge the garage
D．overcharged the garage
单项选择题
The young mother tried her best to keep her temper, but in the end her patience ran ______.
A．away
B．out
C．off
D．over
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