单项选择题

Preparations are being made for the Olympic Games（）in Beijing in 2008.

A．held
B．holding
C．to hold
D．to be held

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单项选择题
（）for your advice, we'd never have been able to overcome the difficulties.

A．Had it not
B．If it were not
C．Had it not been
D．If we had not been
单项选择题
Children shouldn't（）on the conversation between their parents and others.

A．break in
B．break down
C．break out
D．break away.
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