68、Many environmentalists, and some economists, say that free trade encourages industry to relocate to countries with ineffective or poorly enforced antipollution laws, mostly in the developing world, and that, in order to maintain competitiveness, rich nations have joined this downward slide toward more lax attitudes about pollution.
　　(A) that, in order to maintain competitiveness, rich nations have joined this downward slide toward more lax attitudes about pollution
　　(B) that, for maintaining competitiveness, rich nations join in this downward slide toward more lax attitudes about pollution
　　(C) that rich nations join this downward slide toward more lax attitudes about pollution because of wanting to maintain competitiveness
　　(D) that in rich nations, joining this downward slide toward more lax attitudes about pollution is a result of wanting to maintain competition
　　(E) that wanting to maintain competition is making rich nations join in this downward slide toward an attitude about pollution that is more lax
　　原文意思：
　　很多专家认为自由贸易鼓励工业到一些什么国家去并且认为那些富国为了维持竞争力也准
　　备这么干。
　　题目分析：
　　原文体现了一个并列关系，就是很多专家认为并且认为，A 读起来前后还比较一致，暂时保留。
　　B 用 join 一个一般现在时，证明这个事情经常发生，意思不对，应该是这些富国也已经加入了这个活动，用完成时好一些。
　　C 也用一般现在时，而且后面的 because of wanting说话太绕了，干掉。
　　D 用 in rich nations，后面拿个 join 的发起者就不清楚了，干掉。
　　E wanting to maintain competition is making rich nations 这段意思读起来很绕，不象正确答案，干掉。