It is polite in public piaces.

问题描述：

It is polite in public piaces.
a keeping your voice down
b to keep your voice up
c keeping your voice up
d to keep your voice down
1个回答 分类：英语 2014-11-02

问题解答：

我来补答
It is polite _d to keep your voice down_ in public places.
公众地方小声说话是基本礼貌.
 
 
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