单项选择题

A．Living conditions.
B．Sunshine and fresh air.
C．Air-conditioned houses.
D．A few flowers and a few leaves.
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单项选择题
A．Shop assistant and customer.B．Post clerk and customer.C．Store keeper and customer.D．Waitress and customer.
A．Shop assistant and customer.
B．Post clerk and customer.
C．Store keeper and customer.
D．Waitress and customer.
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