单项选择题

Because fuel supplies are finite and many people are wasteful, we will have to install_______ solar heating device in our home.

A．some type of
B．some types of a
C．some type of a
D．some types of
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单项选择题
A．rightB．demandC．requestD．claim
A．right
B．demand
C．request
D．claim
单项选择题
She was standing outside in the snow, _______with cold.
A．spinning
B．shivering
C．shaking
D．staggering
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