While we were running on the playground, Jack suddenly stopped and lay on the ground,so we all stopped what was wrong with him.
A. to run; to see
B. running; seeing
C. running; to see
D. running; see
网友回答
A. to run; to see
B. running; seeing
(答案→)C. running; to see
D. running; see
解析：stop后接不定式表示停下来去做另一件事,接动名词表示停止正在做的事情. 句意:当我们正在操场上跑步时,杰克突然停下来,躺到了地上,因此我们所有人都停下来看看他怎么了. 结合语境可知选C.