At that moment，he was last __________ the room with his friends．

At that moment，he was last __________ the room with his friends．

A．seen leaving       B．to see leave        C．seen to leaving     D．to see to leave

At that moment，he was last __________ the room with his friends．

1. A.
   seen leaving
2. B.
   to see leave
3. C.
   seen to leaving
4. D.
   to see to leave

At that moment，our monitor entered ______ the classroom．

　　A．to　　B．into　　C．in D．／