单项选择题

A．They are a type of insect.
B．They are a kind of fish.
C．They are a type of bird.
D．They are a type of pig.
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单项选择题
A．18 American undergraduates.B．18 American postgraduates.C．18 overseas undergraduates.D．18 overseas postgraduates.
A．18 American undergraduates.
B．18 American postgraduates.
C．18 overseas undergraduates.
D．18 overseas postgraduates.
单项选择题
A．The coffee market in Boston.B．The role of supermarkets in the coffee business.C．A new trend in the United States.D．The advertising of a new product.
A．The coffee market in Boston.
B．The role of supermarkets in the coffee business.
C．A new trend in the United States.
D．The advertising of a new product.
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