We must stop the children from with fire.A. playB. to playC. playingD. are playing

问题补充：

We must stop the children from with fire.

A. play

B. to play

C. playing

D. are playing

答案：

A. play

B. to play

(答案→)C. playing

D. are playing

解析：句意：我们必须阻止孩子们玩火。stop sb from doing sth阻止某人做某事，固定结构，故选C