Don’t leave the water while you brush your teeth. A. run B. running C. being run D. to ru

问题补充：

Don’t leave the water while you brush your teeth.

A. run

B. running

C. being run

D. to run

答案：

A. run

(答案→)B. running

C. being run

D. to run

解析：考察非谓语动词，leave the water running指的是让水一直流，表状态。水和run之间是主动关系。所以选择B