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
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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
单项选择题
The clumsy movement of the giant panda amused all the ______.
A．visitors
B．witnesses
C．watchers
D．spectators
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