It's still polite to give up your seat to an old man 里为什么要加an呢,可以不加吗?

It's still polite to give up your seat to an old man 里为什么要加an呢,可以不加吗? It's not polite to talk to your mother______that It's not polite to ask other people______(person) question. It's not polite to s___ at your parents. It's polite of sb to do sth 准确翻译 It's not polite to c___gum in publicc_____填什么 It's ____ (polite) to smoke in public It's polite to say please英语同义句 it's polite for you to leave w____ saying people laugh at等于It's not polite to laugh at others.It's not polite to _____ ______ ______ others. laugh at等于It's not polite to laugh at others.It's not polite to _____ ______ ______ others. It's still too early to quit. it is polite to do It's polite/rude to sb to do sth怎么译It's polite/rude of sb to do sth急！ 1.It’s not polite to speak in public.( )1.It’s not polite to speak in public.A.loudB.loudlyC.louder我只知道不定式得用TO . It's polite for people----------thanK you veIt's polite for people----------thanK you very often.A.to sPeaK B.to talK C.to tell D.to say 1.In western countries,it's not polite to ask other's p--- affairs 翻译英语 it's a good manners to be polite to older.