It’s not polite to enter the other’s room ________ knocking

It is not polite to enter other's rooms()knocking on the doo It's not polite to ask other people______(person) question. It's not polite to s______ to the old people. It's not polite（礼貌）to ask other's a_______ in western(西方的)co it’s not polite to ask() it is not polite （） you to eat from other's plates?of or for laugh at等于It's not polite to laugh at others.It's not polite It is polite ______ to other people's question. It's not polite to talk to your mother______that It's not polite to s_____ to the old people(人) 英语翻译讲话时嘴里有食物是不礼貌的.It’s not polite to talk ________ _______ _ It's not polite to point___anyone___your chopstics.(介词)