单项选择题

They are put to work when young, and they stay ______.

A．to
B．down
C．up
D．put

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单项选择题

Things went well for her during her early life but in her middle age her_________seemed to change.

A．affair
B．luck
C．event
D．chance

单项选择题

I told him how to get there, but perhaps I______ him a map.

A．should have given
B．ought to give
C．had to give
D．must have given

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