单项选择题


Passage One
Questions 16 to 18 are based on the passage you have just heard.

A．Four.
B．Five.
C．Six.
D．Seven.
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单项选择题
A．$130.B．$300.C．$230.D．$30.
A．$130.
B．$300.
C．$230.
D．$30.
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