单项选择题

In order to improve our standard of living, we have to accelerate production.

A．involve
B．decrease
C．speed up
D．give up
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The economy continued to exhibit signs of decline in September.
A．play
B．show
C．send
D．tell
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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