When we went into the park we saw someone Chinese Kungfu.A. playsB. playing C. to play

问题补充：

When we went into the park, we saw someone Chinese Kungfu.

A. playsB. playing C. to play

答案：

解析：句意：当我们去公园的时候，我们看到一些人在练中国功夫。see sb. doing sth.看到某人正在做某事，固定词组。