It is polite to ___（问候）each other when you meet.greet吗?

It is polite ___( speak) to the old ______( polite). it is polite to do It is polite to ___（问候）each other when you meet.greet吗? Is it polite to eat noisily? it is polite to follow them To spit in public places is not polite.(改为同意句)___ isn't polite ___ spit in public places. It is not polite to stare at others. It is polite for/of you to do,哪个对? It is polite to smile to others .(变成同义句） —— smile to others ------ polite . It is not polite ___(knock) on your neighbour door like that It's not polite to ___(shout)in the classroom.填什么? 英语的改错题：It is not polite to shout to other people.改错：It is not polite to shout to other peopleperson 的复数就是people吧。 It is polite to say＿(再见) to your friends when ...It is polite to say＿(再见) to your friends when you leave their home. It is more polite to write to friends than to call them 的意思 It is _____to say to your mother like this Do it _____(polite) Is it polite for us to ask about a girl is age? 英语翻译It is then polite to invite the friends to your home. It is [polite]for him to speak to the old than before