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题库 / Prep2007E1-SC-23
While they remove carbon dioxide from the air, conserve soil and water, and house thousands of species, forests also supply potentially valuable pharmaceuticals, and, as sources of building material and firewood, that provide employment for millions worldwide.
pharmaceuticals, and, as sources of building material and firewood, that provide
pharmaceuticals, and sources of building material and firewood, are providers of
pharmaceuticals and, as sources of building material and firewood that are providing
pharmaceuticals and sources of building material and firewood, for providing
pharmaceuticals and, as sources of building material and firewood, provide
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
(A) and that结构没有平行对象
(B) 去掉as后,后半句变为forest also supply… , and sources… are providers…意思变为:森林也提供了有潜在价值的药材,并且建筑材料和柴火的来源成为了全球上百万岗位的提供者. 改变了原句意思
(C) and, as sources of building…结构没有动词,跟also supply不平行
(D) 语法上sources of…和pharmaceuticals并列,改变了原句的意思
(E) 正确, forsts also supply…and provide…结构平行
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