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32. (2013 •安徽) From space,the earth looks blue. This is about seventy-one percent of its surface is covered by water.

   A. why   B. how

   C. because   D. whether

32. C

32. C解析:考查名詞性從句。句意:從太空 上看，地球看起來是藍色的。這是因為它 表面大約71 %都被水覆蓋著。

because引 導表語從句，表示原因，符合句意。why意 為“為什么”，所接句子表示結果；how表 示方式;whether意為“是否”。

題目來源：2016年周測月考直通高考高中英語必修3外研版 > 周測月考卷4 階段性測試（一）

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