单项选择题

(2001) ____for y°u help .we’d never have been able to get over the difficulties.

A．If we had not been
B．If it were not
C．Had it not been
D．Had it not
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单项选择题
(2001) Only when they______ the importance of the plan, will they make up their minds to carry it on.
A．realized
B．will realize
C．have realized
D．will have realize
单项选择题
(2010)What matters most____not winning but participating.
A．are
B．to be
C．was
D．is
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