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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单项选择题
61（）

A．Central
B．Federal
C．Official
D．Public
单项选择题
She is making herself iii with ______ over her son's future.
A．troubles
B．annoyance
C．worry
D．consideration
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