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    【題目】Do you know about 70 per cent of our earth _____ water?

    A. is covering with B. are covered with

    C. are covering with D. is covered with

    【答案】D

    【解析】句意:你知道我們的地球大約70%被水覆蓋著嗎?be covered with“覆蓋著……”,主語about 70 per cent of our earth是不可數(shù)名詞,故謂語用第三人稱單數(shù),故選D。

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