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
John is eligible for this job．
A． accepted
B．qualified
C．rejected
D．recommended
单项选择题
Rock climbing is hazardous．
A． interesting
B．dangerous
C．attractive
D．useful
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