it's____(polity) to laugh at the old people填什么

it's____(polity) to laugh at the old people填什么 It s____ that it's going to rain首字母填空 It`s____(danger)to play football in the street. Is this car for s____?I want to buy it. It's not good for parents to s____ their children. It's____(not safe)to swim alone in the river It's____(think) of Jack to play CDs for us. must the old people be spoken to polity 为什么用 be spoken to i knew nothing about it because she s____ nothing to me about it. It's s____ of you to do it like that首字母填空 it's____ ____ (posible ) for us to fly to the moon是 possible 写错了 It's cold now.please put on your s_____,children.It's cold now.please put on your s____,children.They s____ many cheap things to us. Do you think it's____(明智的)Do you think it's____(明智的)to bring a map than a mobile phone？ It's____ (real) hot today It is s____ heavily now. the time is 9:40,it’s____ a.twenty to ten b.forty past nine 我们该做作业了.It`s____ ____ ____ to do homework. it's____(help)to discuss your problems with your friends.适当形式填空.