单项选择题

What do we know about the speakers
[A] They are friends.
[B] They work together.
[C] They are meeting for the first time.
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单项选择题
If you are staying in Room 188, and you want to call a friend outside the university at 738-9087, how would you make the call
[A] Press 89087.

B. Press 9, then 89087.

C. Press 9, then 738-9087.

D. Press 9087.
单项选择题
From the last sentence of the passage we can learn that
[A] we can put noise under control if our measures are effective
B. sometimes we have to shout loudly so that others can hear us
C. shouting is a chief cause of noise pollution
D. it is important to warn people of the danger of noise pollution
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