单项选择题

It is quite necessary for a qualified teacher to have good manners and ______ knowledge.

A．extensive
B．expansive
C．intensive
D．expensive
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单项选择题
You cannot be （）careful when you drive a car.

A．very
B．so
C．too
D．enough
单项选择题
Physics is （）to the science which was called natural philosophy in history.

A．alike
B．equivalent
C．likely
D．uniform
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