单项选择题


A．businesses
B．services
C．products
D．occupations
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单项选择题
A．infectionB．relationC．promotionD．affection
A．infection
B．relation
C．promotion
D．affection
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A．relieveB．believeC．perceiveD．receive
A．relieve
B．believe
C．perceive
D．receive
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