It is polite ___( speak) to the old ______( polite).

It is polite ___( speak) to the old ______( polite). it is polite to do It is not polite ___(knock) on your neighbour door like that It is polite to ___（问候）each other when you meet.greet吗? 用it is polite that.造句 It is polite ( ) in public places It is not polite. laugh at people Is it polite to eat noisily? it is polite to follow them from与from to 如：how far is it from sp.to sp.与how far is sp.from sp. What do you ___ ___her?She is polite and friendlWhat do you ___ ___her?She is polite and friendly 英语翻译It's not polite ___ ___ ___ a full mouth . To spit in public places is not polite.(改为同意句)___ isn't polite ___ spit in public places. It is not polite _____(speak) loudly in the library. It is not polite to stare at others. I ___to leave without __goodbye.该选什么?a think it is not polite,sayb thinks it is not polite,sayingc don't think it is polite,say d don't think it is polite,saying I ___to leave without __goodbyea think it is not polite,sayb thinks it is not polite,sayingc don't think it is polite,say d don't think it is polite,saying it is not polite 后面的动词用什么形式?