单项选择题

When you are at your（）end，you should not lose your head.

A．wit's
B．wit
C．wits'
D．wits's

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单项选择题
That not-well-planned proposal leaves（）room for discussion.

A．much
B．a big
C．a bigger
D．a much bigger
单项选择题
Her house is within（）from the police station.

A．a stone's throw
B．a throw of a stone
C．stone's throw
D．the stone's throw
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