He suggested the problem worth paying attention ________ at the meeting．

1. A.
   be discussed
2. B.
   to be discussed
3. C.
   being discussed
4. D.
   be discussing

He suggested the problem worth paying attention ____________ at the meeting．

 A. to be discussed        B. to discussing         　 C. to discuss            　 D. to being discussed 

He suggested the problem worth paying attention_____ at the meeting.