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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
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(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
句子结构: While they remove…, conserve…, and house…, forests also supply…, and,…,provide…
句中的as成分作为插入语修饰forests.原句的意思为:森林一方面处理空气中的二氧化碳,保护水土并为上千种生物提供住处,另一方面提供了有潜在价值的药材并且,作为建筑材料和柴火的来源,为全球提供了上百万的工作岗位
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