同义句转化it is certain that using plastic bags cause a lot of pollution —— —— —— —— ——

What colour is it?同义句转化 同义句转化it is certain that using plastic bags cause a lot of pollution —— —— —— —— —— It is certain that the teacher will jion us同义句 It seems that she is very sad转化为同义句 同义句转换It is certain that he will agree to help us.（___ ___ ___ ___ ___he will agree to help us. It is not easy for me t get here.同义句.It is___for me to___here. This is my ruler.(改为同义句）No,it isn't.It's________ 造句it is certain that. The shop is near our school同义句转化The shop isn't （）（）our school he has never forgot it,i think.同义句转化 He is not sure whether he will be to write a Book同义句,用certain It doesn't work 同义句 you can't miss it.同义句 You needn't do it.同义句 It isn't hard.的同义句 The question is so difficult that I can't answer it(改为同义句) the question is so difficult that we can't answer it.(同义句) this question is very hard,i can't answer it(改未同义句）