It is polite in public piaces.a keeping your voice downb to keep your voice upc keeping your voice upd to keep your voice down

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/13 09:57:34

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

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.