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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单项选择题
Ordinary plants are unable to survive in the desert mainly because of the changeable weather.
A． Right
B． Wrong
C． Not mentioned
单项选择题
Grasses and flowers in desert are able to survive because they stay in the form of seeds to wait for the right amount of water to come.
A． Right
B． Wrong
C． Not mentioned
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