单项选择题

A．The effects of noise on the quality of life.
B．The role of air traffic restrictions.
C．The production of quieter engines.
D．The economic aspects of noise reduction.
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单项选择题
A．They produced more cars than American manufacturers.B．They reduced car-production in America.C．They gave up more market share to the natives.D．They took over plants and manufacturing capacity.
A．They produced more cars than American manufacturers.
B．They reduced car-production in America.
C．They gave up more market share to the natives.
D．They took over plants and manufacturing capacity.
单项选择题
A．It isn’t reliable.B．It needs checking.C．It is definitely trustworthy.D．It won’t hurt to try.
A．It isn’t reliable.
B．It needs checking.
C．It is definitely trustworthy.
D．It won’t hurt to try.
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