to take off,good manners,it is,your shoes,in some Asian coun

It is good manners to help ____ in touble. it is good manners to wait in line.既然是is 后面为什么是manners （mann It is good manners in public. Is it good manners to others'talking? 英语翻译It is good manner to tkae off your (1.) before you go in It's good manners to keep your __ （声音）down in public. It is good manners to put up your hands before you answer a Please take off your shoes It is a Japanese _________ to take off one’s shoes before en it is custom to take off the shoes 为什么用不定式呢?而不用that? But it is good to know that all manners begin in the same wa It’s good manners not to shout in public.It's bad manners __