61.   

Which of the following best completes the passage below? 

At a recent conference on environmental threats to the North Sea, most participating countries favored uniform controls on the quality of effluents, whether or not specific environmental damage could be attributed to a particular source of effluent.  What must, of course, be shown, in order to avoid excessively restrictive controls, is that __________.

(A) any uniform controls that are adopted are likely to be implemented without delay

(A) any uniform controls that are adopted are likely to be implemented without delay

(B) any substance to be made subject to controls can actually cause environmental damage

(C) the countries favoring uniform controls are those generating the largest quantities of effluents

(D) all of any given pollutant that is to be controlled actually reaches the North Sea at present

(E) environmental damage already inflicted on the North Sea is reversible

正确答案是B。我选的是D。感觉BD区别就是D把范围特定到North Sea at present，感觉更贴近原题……还有还有，这道的逻辑关系还是有点没理得很清楚。

 avoid excessively restrictive controls意思是把一些不该control的也control了

那么要避免这样的情况就是，列入控制的名单的物质，必须是的的确确的会污染环境。所以是B

将来所有受控制的物质都会到达北海，但是没有解决一个问题：有没有冤大头，如果没有污染环境而被误认为是污染环境的物质收到了控制

 不知道这样理解对不对，pollutant和environmental damage也不一定就是

一个东西。所以D不对。 

可否这样理解D： all of any given pollutant actually reaches North Sea at present.

原文没有提到"reach" 的问题，我认为是无关选项