单项选择题

If we ______ timely changes to the plan, a great deal of time and money would have been lost.

A．shall not make
B．would not make
C．did not make
D．had not made
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单项选择题
Lucy did not have time to go to the concert last night because she was busy ______ for her English test.
A．being prepared
B．to be prepared
C．to prepare
D．preparing
单项选择题
There is a risk in this method: the rope ______ break, causing the box to fall and be damaged.
A．should
B．might
C．might not
D．should not
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