单项选择题

You cannot be _____careful when you drive a car.

A．very
B．so
C．too
D．enough
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单项选择题
The British constitution is ______ a large extent a product of the historical events described above.
A．within
B．to
C．by
D．at
单项选择题
When he realized the police had spotted him, the man_____ the exit as quickly as possible.
A．made off
B．made for
C．made out
D．made up
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