We should remember to save water resource and not to leave the water all the time.
A. to be running
B. to run
C. running
D. run
网友回答
A. to be running
B. to run
(答案→)C. running
D. run
解析：leave sth doing 让……处于某种状态, the water与run为主动关系, 再根据all the time, run应该为持续的经常性的动作, 故答案为C