单项选择题

A．Providing a warning light when the sound is too loud.
B．Producing more personal stereo systems.
C．Restricting the use of personal stereos.
D．Setting up a standardized hearing test.
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单项选择题
A．Tom is very responsible.B．Tom’s words aren’t reliable.C．What Tom said is true.D．Tom is not humorous at all.
A．Tom is very responsible.
B．Tom’s words aren’t reliable.
C．What Tom said is true.
D．Tom is not humorous at all.
填空题
S8. Music in America is regarded as ______ , because people grow up with it.
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