问题补充:
We should remember to save water resource and not to leave the waterall the time.
A. to be running
B. to run
C. running
D. run
答案:
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