单项选择题

______ for your help, we' d never have been able to get over the difficulties.

A．If we had not been
B．Were it not
C．If it were not
D．Had it not been
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单项选择题
John asked his mother to ______ the hole in the pocket of his jeans.
A．fill
B．fix
C．mend
D．repair
单项选择题
Edwin always has his hair cut at the ______ situated at the comer.
A．barber
B．barber's
C．barbers
D．barbers'
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