单项选择题

A．Fuel-efficient cars.
B．Air pollution caused by cars.
C．History of Automobile developments.
D．Electric-powered cars.
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单项选择题
A．Speak very slowly but loudly.B．Ask questions frequently.C．Vary pitch, volume and speed of speech.D．Keep the speech clear and concise.
A．Speak very slowly but loudly.
B．Ask questions frequently.
C．Vary pitch, volume and speed of speech.
D．Keep the speech clear and concise.
单项选择题
A．She went there last year.B．Her sister works there.C．She lives only thirty minutes away from there.D．She goes there on regular business trips.
A．She went there last year.
B．Her sister works there.
C．She lives only thirty minutes away from there.
D．She goes there on regular business trips.
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