单项选择题

The index is the government's chief gauae of future economic activity.

A．measure
B．opinion
C．method
D．decision
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单项选择题
Rock climbing is hazardous.
A．interesting
B．dangerous
C．attractive
D．useful
单项选择题
It's sensible to start any exercise program gradually at first.
A．workable
B．reasonable
C．possible
D．available
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