---What do you think Mr.Green is like?
---Haven’t you seen through him?I have warned you again and again that men of this kind______.

1. A.
   is in danger
2. B.
   are in danger
3. C.
   is dangerous
4. D.
   are dangerous

—What do you think Mr.Green is like?

—Haven’t you seen through him?I have warned you again and again that men of this kind______

A．is in danger    B．are in danger     C．is dangerous     D．are dangerous