单项选择题

The highest and best form of efficiency is the spontaneous cooperation of a free people.

A．internal
B．compulsory
C．competent
D．natural
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单项选择题
Various measures intended to facilitate economic recovery in the affected area have been suggested.
A．appeal to
B．attribute to
C．attend to
D．contribute to
单项选择题
The Chinese sometimes feel obliged to simulate reluctance when they are quite willing.
A．stimulate
B．pretend
C．resemble
D．presume
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