Peter,do remember_____is dangerous to play with fire!

Peter,do remember_____is dangerous to play with fire! It's dangerous to play with fire. It's dangerous playing with fire与It's dangerous to play with It is dangerous to play with fire.为什么加with为什么play basketball You ------ play with fire .it is dangerous. _______(play) with fire is very dangerous To play with fire is dangerous .还可以写成什么形式? 连词成句with,it,found,was,we,to,play,dangerous,fire ___ with fire is dangerous.A.play B.playing C.played D.To pl to play with fire is dangerous是不是没有这样的用法. tell the boy not to play with fire ,it is dangerous,为什么用not 2.It is ___ dangerous for children to play with fire.