单项选择题

If motorists had to pay an extra tax to drive in cities, they ______ their cars a lot less.

A．use
B．will use
C．used
D．would use
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单项选择题
We stayed at home because Mary wasn't very ______ on going out in the rain.
A．keen
B．willing
C．want
D．like
单项选择题
You should visit the Empire State building ______ you are in New York.
A．where
B．while
C．which
D．that
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