单项选择题

The old couple were not rich themselves, but they hated to turn away anyone who were ______ food and shelter.

A．at the mercy of
B．on the point of
C．with the exception of
D．in need of
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单项选择题
Living in the central Australian desert has its problems, ______ obtaining water is not the least.
A．of which
B．for what
C．as
D．whose
单项选择题
The little girl wore a very thin coat. A sudden gust of cold wind made her ______.
A．shake
B．sweat
C．shiver
D．swing
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