单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．Six.
B．Seven.
C．Five.
D．Six or seven.
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单项选择题
A．Other American states.B．Foreign countries.C．Regions outside the city where people live.D．Other cities in the state where people live.
A．Other American states.
B．Foreign countries.
C．Regions outside the city where people live.
D．Other cities in the state where people live.
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