原文: In Europe, the obstacle has been conservative local authorities and developers who prefer to ensure quick sales with conventional mass-produced housing.
题目:Many developers prefer mass-produced houses because they…
解析:原文和题目中的句意关键词developer, prefer 均相同，但 “housing” 换成了 “houses”, 即同根词的代换。 “they” 指代 “houses”， 又因为 “because” 应该引导从句，所以答案为动词短语。 “quick sales” 对应的动词短语为上述答案， 也就是说答案也是根据同根词替换而来的。
原文:While this includes complex kingdoms, as in Africa, and ancient empires, such as those of the Americas, the primary focus of attention in the twentieth century has been on small-scale societies.
题目:The twentieth-century collections come mainly from mainstream societies such as the US and Europe.
解析:原文与题目对比出现了一组反义代换词 “small-scale societies” 和 “mainstream societies”.
原文:Countries all over the world are actively promoting their wilderness regions to high-spending tourists. The attraction of these regions is obvious: by definition, wilderness tourism requires litter or no initial investment.
题目:The low cost of setting wilderness tourism makes it attractive to many countries.
解析:low cost=little or no initial investment; “attractive” 为 “attraction”的同根词代换。
原文:In their new location, the beekeeper will pay the farmer to allow his bees to feed in such places as orange groves.
题目: They transport their hives to orange groves where farmers (charge) beekeepers for placing them on their land. Here the bees make honey.