46.They are trying to _____ the waste discharged by the factory for profit.
问题描述：
46.They are trying to _____ the waste discharged by the factory for profit.
A) expose C) exhibit
B) exhaust D) exploit
答
应该是d吧,利用的意思
他们想开发利用工厂排除的废物获取利润.
expose 陈列,揭露
exhibit 展览
exhaust 用尽