单项选择题

Passage Two

A. To categorize the different kinds of sharks.
B. To warn humans of the dangers posed by sharks.
C. To describe the characteristics of shark teeth.
D. To clear up misconceptions about sharks.
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单项选择题
A. Their prices are higher. B. People cannot telephone them. C. Their staff may take less trouble to satisfy customers. D. One has to queue up to pay in them.
A. Their prices are higher.
B. People cannot telephone them.
C. Their staff may take less trouble to satisfy customers.
D. One has to queue up to pay in them.
单项选择题
A
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