单项选择题

Because of the fuel shortage in the world, it is necessary for everyone to______ gasoline.

A．subscribe
B．conserve
C．forsake
D．blaze
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单项选择题
The people who objected to the new approach were told that since work had already started there was no point in______.
A．protesting
B．overthrowing
C．reeling
D．growling
单项选择题
In my opinion, you can widen the______ of this improvement through your active participation.
A．dimension
B．vicinity
C．magnitude
D．scope
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