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
Convenient foods which are already prepared for cooking are ______ in grocery stores.
A．ready
B．approachable
C．probable
D．available
单项选择题
The manager lost his ______ just because his secretary was ten minutes late.
A．mood
B．temper
C．mind
D．passion
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