I couldn’t help ________ when I saw the naughty monkey.A.to laugh B.laughing C.laughed D.laugh选哪个为什么?

问题描述:

I couldn’t help ________ when I saw the naughty monkey.
A.to laugh B.laughing C.laughed D.laugh
选哪个为什么?

B.
固定搭配啊.help doing