单项选择题


Questions 19 to 21 are based on the conversation you have just heard.

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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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.
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.
单项选择题
A．The texts are the revealing of the texters’ characters.B．The texts are well written by the texters.C．The texts are unacceptable by others except the texter.D．The texts are shocking to others and the texter himself.
A．The texts are the revealing of the texters’ characters.
B．The texts are well written by the texters.
C．The texts are unacceptable by others except the texter.
D．The texts are shocking to others and the texter himself.
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