单项选择题

What is the attitude of the narrator towards the measure taken to noise control

A．Satisfied.
B．Indifferent.
C．Concerned.
D．Optimistic.
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单项选择题
Which of the following does not belong to the usual requirements of the Federal Aviation Administration
A．New aircraft should meet specified noise standards.
B．Reducing the noise pollution by muting flights over water or unpopulated areas on takeoff and landing.
C．Constructing sound barriers.
D．Asking people to move away from near the airport.
单项选择题
Why did Gates drop out of Harvard in his junior year
A．Because he could not pay the tuition.
B．Because he fell far behind others in his study.
C．Because he didn't like the subject he was majoring.
D．In order to devote his time to Microsoft.
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