单项选择题

In my opinion, you can widen the ________ of these improvements through your active participation.

A．dimension
B．volume
C．magnitude
D．scope
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单项选择题
The flat where we live ________ three rooms only.
A．is comprised of
B．is made of
C．contain
D．is composed of
单项选择题
A country must always be ________ guard against spies and invaders.
A．in
B．to
C．with
D．on
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