问题描述： It's good manners to keep your __ （声音）down in public. 1个回答 分类：英语 2014-11-20 问题解答： 我来补答 It's good manners to keep your _voice_ （声音）down in public.人的声音用voice有不明白的地方欢迎追问, 展开全文阅读
