题目内容

11．Two ______ of the earth's surface ______ water．（　　）
A．third； isB．thirds； isC．third； areD．thirds； are

分析 地球表面三分之二被水覆盖．

解答 答案：B 由基数词和序数词构成 分数，分子用基数词，分母用序数词，如果分子超过"1"时，分母用复数．本题中的主语是surface，所以谓语动词应该用第三人称单数．所以本题选择B．

点评 考生要掌握英语中分数的表达，分数在英语中通常是借助于基数词和序数词来共同表达的．其中基数词表示分子，序数词表示分母．并且注意句中的主语，这决定着谓语动词的形式．

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14．A．advisedB．discussedC．submittedD．suggested
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16．A．fromB．byC．withD．into
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