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  3. A study found that the environmental costs of producing and recycling paper cups

A study found that the environmental costs of producing and recycling paper cups

游客2023-12-26  45
问题 A study found that the environmental costs of producing and recycling paper cups were as high as, if not higher than, to produce and recycle polystyrene cups.
选项 A、those of producing and recycling
B、that of producing and recycling
C、which produced and recycled
D、that produced and recycled
答案 A
解析 本题重点考查比较句中被比较对象的代词指代用法。如果被比较的对象是一个名词词组，要注意中心词的单复数。画线部分是在一个比较状语从句中，比较的对象是中心词costs，比较结构是as high as，因此两个被比较的对象在形式上应该保持一致。四个选项中，首先排除C和D选项，因为与前面被比较的对象在形式上不平行。而B选项中的代词that是单数，与前面costs不对应。故选A，those能指代costs。
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