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单项选择题
A．Families with cars.B．Americans’ heavy dependence on cars.C．Roads and highways.D．Traffic problems in America.
A．Families with cars.
B．Americans’ heavy dependence on cars.
C．Roads and highways.
D．Traffic problems in America.
单项选择题
A．Ten rooms.B．Thirty thousand rooms.C．Several hundred rooms.D．About three thousand rooms.
A．Ten rooms.
B．Thirty thousand rooms.
C．Several hundred rooms.
D．About three thousand rooms.
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