I saw them [] the windows when I went to look for jim.A cleaning B cleaned C clean D to clean

问题描述:

I saw them [] the windows when I went to look for jim.A cleaning B cleaned C clean D to clean

cleaning
表示 我看到他们正在擦窗户没看到后面的went吗看到了哇 就是当我去找jim的时候 我看到他们在擦窗户