单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．3 bags.
B．10 bags.
C．They don’t have any bags.
D．5 bags.
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单项选择题
A．Several weeks.B．Until your doctor tells you.C．12 months.D．At least 6 months.
A．Several weeks.
B．Until your doctor tells you.
C．12 months.
D．At least 6 months.
单项选择题
A．A university campus.B．A book store.C．A department store.D．A police station.
A．A university campus.
B．A book store.
C．A department store.
D．A police station.
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