单项选择题

Many elderly people have to live on the money they ______ when they were working.

A．laid up
B．put back
C．set up
D．put aside
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单项选择题
—She was in class on Friday afternoon, but no one has seen her since.—She ______ an accident.
A．might have
B．might have had
C．may have
D．ought to have had
单项选择题
There was a shortage of water in the area two months ago ______ hot weather.
A．by way of
B．in spite of
C．because of
D．by means of
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