题目内容：
What is polite when considering noise?
A.Do not yell or laugh so loud as to disturb or annoy others.
B.Do not talk on your cell phone or play music very loudly.
C.Do not argue in public and say critical things.
D.All of the three.
参考答案：
选择题：What is polite when considering noise?
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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