问题补充：
That is the only way we can imagine the waste of water in students’ bathroom.
A. stop
B. stopped
C. stopping
D. to stop
答案：
A. stop
B. stopped
C. stopping
(答案→)D. to stop
解析：句意：这是我们能假设唯一的方法去阻止学生的浴室浪费水。分析句子中we can imagine做way定语，因此为去阻止的方法，用动词不定式。故选D
