When the students were playing games on the playground, Jim suddenly stopped _____and began to cry, so we stopped _______ what was wrong with him.

A．to play; seeing

B．playing; to see

C．playing; seeing

D．to play; to see

内部劳动力市场是一种( )。

A．人才交流市场
B．人才分配市场
C．人才储备市场
D．劳动力分配的管理系统