题目内容：

can you tell us the use ____the waste water from the factory?
(you make of)为什么不填what you make of?

优质解答

我们把句子改为陈述句,就能清楚的看出来是为甚么了.
can you tell us 这是疑问时要用到的,先不管,看后面：you make use of the waste water from the factory(意思是：你将工厂排出的污水回收利用）
很显然改为疑问句时,将 use 提前,后面照着写下去,因为本句中不缺任何成分,所以不加what