该题考查的是句型“There is no + doing…”的用法,其中“there is no”表“不可能”.
there is no doing sth=it is impossible to do sth
再如：
There is no telling what he is going to do．说出他要干什么是不可能的.
There is no saying what may happen. 说出将要发生什么是不可能的.There is no expecting what will happen. 无法预料会发生什么事情.