单项选择题

A．dose
B．drug
C．prescription
D．herb
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单项选择题
A．regularlyB．seldomC．infrequentlyD．occasionally
A．regularly
B．seldom
C．infrequently
D．occasionally
单项选择题
A．persuadesB．encouragesC．preventsD．inspire
A．persuades
B．encourages
C．prevents
D．inspire
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