单项选择题

Classification is a useful ______ to the organization of knowledge in any field.

A．means
B．approach
C．mode
D．manner
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单项选择题
I turned down his invitation to dinner as I didn't want to ______ on him.
A．invade
B．disturb
C．interfere
D．impose
单项选择题
This article was written ______ for China Daily.
A．extensively
B．exceedingly
C．excessively
D．exclusively
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