Question

It is universally        that dogs have a good sense ofsmell

1. A.
   acknowledged
2. B.
   acknowledging
3. C.
   to be acknowledged
4. D.
   knowledge

Answer 1

A
考察语态。句意：都知道狗的嗅觉很灵敏。It指代that从句内容，是动作的对象，故用被动语态。选A。