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单项选择题

A．A new fuel for buses.
B．A way to improve fuel efficiency in buses.
C．The causes of air pollution.
D．Careers in environmental engineering.
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热门试题

单项选择题A．Don’t write the character reference for Alex.B．Don’t tell the truth about Alex in the character reference.C．To go out and have coffee with her.D．To go to the restaurant with her.

A．Don’t write the character reference for Alex.
B．Don’t tell the truth about Alex in the character reference.
C．To go out and have coffee with her.
D．To go to the restaurant with her.

单项选择题A．Government funded.B．Political.C．Private.D．None of the above.

A．Government funded.
B．Political.
C．Private.
D．None of the above.