单项选择题

A．A slight drop in the use of cocaine.
B．A drop in the use of cigarettes.
C．A sharp rise in the use of drugs.
D．A rise in the use of alcohol.
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C
单项选择题
A．His father or mother may have a poor memory.B．His memory is not often used.C．He does not use his arms and legs for some time.D．He cannot read or write.
A．His father or mother may have a poor memory.
B．His memory is not often used.
C．He does not use his arms and legs for some time.
D．He cannot read or write.
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