单项选择题

I doubt ______.

A．whether he can come
B．if he can come or not
C．while he will be here
D．that he will come
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单项选择题
He finished reading and went on ______ a composition.
A．write
B．to write
C．writing
D．being written
单项选择题
Don't risk ______ the chance which so many people dream of.
A．losing
B．to lose
C．lost
D．your life to lose
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