◎ 题干
—How about the pollution in the countryside?
—Luckily, it's not as serious as _______ in the big cities.
A.thatB.itC.oneD.those
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—How about the pollution in the countryside?—Luckily, it's not as serious as _______ in the big cities.A.thatB.itC.oneD.those…”主要考查了你对  【人称代词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。