it's dangerous (driving) a car at such a higt speed.为什么用ing?括号里为什么哦用driving,不用to drive?

It's danger 还是 It's dangerous Don't____the street.It's dangerous.(across) It’s dangerous.改成否定句 It's dangerous.(改为否定句） Don't b_____the paper.It's dangerous. Don,t t______it.It,s dangerous It's dangerous work,but it brings us fun Don't play football in the s( ) .It's dangerous. Don't play with fire.It's dangerous.合并成一句 Don`t_____(play) with fire .It`s dangerous.要理由 Tom,____(not play)football here,it's dangerous You mustn't d---- too fast. It's very dangerous. Be careful___ (not drive) too fast It's dangerous Please don't go out side It's dangerous中文 It's _____ to me.A.dangerous B.danger 为什么? _____(out)It's dangerous to play in the street Don't s____ out late at night .It's dangerous. Don't swim in the l___ alone.It's dangerous.