---Do you often see William ________ on the playground?

---No, but he is often seen ________ Chinese Kongfu in the park.

1. A.
   run, play
2. B.
   run, to play
3. C.
   running, play
4. D.
   running, to play

——Do you often see William       on the playground?

——No, but he is often seen       Chinese Kongfu in the park．

A．run, play                                                  B．run, to play

C．running, play                                                   D．running, to play