Is it polite for us to ask about a girl is age?

Is it polite for us to ask about a girl is age? it is happy _______ us to help people in need.----Yes.And it is polite _____ us to do so.it is happy _______ us to help people in need.----Yes.And it is polite _____ us to do so.A.for ,for B.for ,of C.of ,for D.of ,of It is polite for/of you to do,哪个对? it is good for us It is very ________ for us to spend much time with family and friends.A.rude B.polite C.important D.relaxed 英语翻译Be politeBeing polite is a good tradition in our country.Nobody likes a person who is impolite.It 's important for us to be polite.We should be a polite student.As a polite student,we shouldn't talk at class.If we have questions,we should is it good for for us or bad for us It is polite of us to（ ） the food on your plate It is polite of us to give our seats to_____(患病的)people on the bus it is polite to do It is diffcult for us stand up it is good for us study english it is difficult a book for us I think it is bad for us It is polite ___( speak) to the old ______( polite). when we were young,the parents and teachers toid us that it is important for us to polite for other pepole.I think I do it well.For example :At once ,I induce an old man to sit on my seat in bus.The old man ’s health is so weak that they can’t lo It is [polite]for him to speak to the old than before 用it is polite that.造句