单项选择题

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

A．Before breakfast.
B．Late morning.
C．Mid-afternoon.
D．Late evening.
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单项选择题
Road courtesy is good sense because ______.
A．it minimizes quarrels
B．it cuts down the number of drivers
C．most drivers will hit you if offended
D．most drivers never make acknowledgements
单项选择题
A．To wear jackets to work.B．Not to use air-conditioners.C．To wear shirt sleeves.D．To take all measures to conserve energy.
A．To wear jackets to work.
B．Not to use air-conditioners.
C．To wear shirt sleeves.
D．To take all measures to conserve energy.
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