its polite to do sth
问题描述：
its polite to do sth
tr
答
原题应改为：It's polite to do sth.（做某事是礼貌的）.例句：1.It's polite to stand in line at the bus stop.（在公交车站内排队是礼貌的.）2.It's polite to talk about the weather when you meet your friend...