It is known to us all_ _ _ _ _there is harm.哪儿有污染

It is known to us all_ _ _ _ _there is harm.哪儿有污染 It is _ difficlt for us to climb the mountains To speak English well for us is diffcult.(改为同义句)_ _ _ _ us _ What a nice _ _ _ _ _ _ _ it is! It's well known to us all _ Beijing will _ the 2008 Olypimc It is known to us ___ where is pollution there is harm. it is hard to say goodbye同义句 _ _ _ is hard you father is your_ _ _ _ _ _ _ it is known to us it's not right for us to _ _ _ _(上学迟到） lt is known that smoking does great ----[harm]to us. It's known to us_______there is pollution,there is harm.