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______of the earth ______ covered by water.
A. Two thirds; is         B. Two thirds; are       C. One thirds; is   
答案
A
解析

试题分析:句意:地球的三分之二被水所覆盖。在英语中分子用基数词表达,分母用序数词表达如果分子大于1,分母变复数。分数,作主语时,根据其后接的词而定,如果为不可数名词,则相当于单数,如果其后接的为可数名词复数形式,则相当于复数。故选A
核心考点
试题【______of the earth ______ covered by water.A. Two thirds; is         B. Two thir】;主要考察你对钟点等知识点的理解。[详细]
举一反三
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A.A number of; four-fifthB.The number of; four-fifth
C.A number of; four-fifthsD.The number of; four-fifths

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