It's impolite to speak loudly _ public.

问题描述:

It's impolite to speak loudly _ public.

in public在公共场所大声讲话是不礼貌的

in public.

in
in public 在公共场合

填写:in
解析:in public 是一个固定词组,“在公共场合”的意思
翻译:在公共场合大声说话是不礼貌的
绝对正确,希望帮到你,祝学习进步