单项选择题


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

A．In bamboo chairs.
B．On bamboo mats.
C．On the floor.
D．On knees.
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单项选择题
A．7 years.B．9 years.C．12 years.D．16 years.
A．7 years.
B．9 years.
C．12 years.
D．16 years.
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