91. Leachate is a solution, frequently highly contaminated, that develops when water permeates a landifill’s site. If and only if the landfill’s capacity to hold liquids is exceeded does the leachate escape into the environment, generally in unpredictable quantities. A method must be found for disposing of leach ate. Most landfill leachate is sent directly to sewage treatment plants, but not all sewage plants are capable of handling the highly contaminated water.
Which one of the following can be inferred from the passage?
A.The ability to predict the volume of escaping landfill leachate would help solve the disposal problem. B.If any water permeates a landfill, leachate will escape into the environment. C.No sewage treatment plants are capable of handling leachate. D.Some landfill leachate is sent to sewage treatment plants that are incapable of handling it. E.If leachate does not escape from a landfill into the environment, then the landfill’s capacity to hold liquids has not been exceeded.
请教这题为什么选E呢？想来想去觉得D是正确的啊，谢谢！
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