问题描述：
don't shout in the library
回答：
1 yes,i don't
2 no,i don't
3 yes ,i am not
4 no i won't
为什么
回答：
1 yes,i don't
2 no,i don't
3 yes ,i am not
4 no i won't
为什么
问题解答：
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