单项选择题

A．The room is on fire.
B．The two persons are bothered by the smoke.
C．There is very little breeze.
D．The two persons are not permitted in the room.
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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.
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.
单项选择题
A．They live longer.B．They eat more salt.C．They have changed their sleeping habits.D．They eat less fruit.
A．They live longer.
B．They eat more salt.
C．They have changed their sleeping habits.
D．They eat less fruit.
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