单项选择题

It is only when you nearly lose something______you will fully realize how much you value it.

A．before
B．that
C．do
D．will
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单项选择题
Some of the middle-aged people______to the meeting were famous professors.
A．were invited
B．who invited
C．inviting
D．invited
单项选择题
Whoever does wrong to his country or to the people deserves______.
A．to punish
B．to be punished
C．to punishment
D．of being punished
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