单项选择题

62（）

A．government
B．commercial
C．advertisements
D．grants

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单项选择题
64（）

A．provide
B．offer
C．buy
D．pay
单项选择题
______ for your help, we'd never have been able to get over the difficulties.
A．Had it not
B．If it were not
C．Had it not been
D．If we had not been
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