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几分之几做主语,谓语动词有什么变化?比如说ofthatcountrybysnow.ATwothirds;iscoveredBTwothirds;arecoveres

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几分之几做主语,谓语动词有什么变化?比如说
___of that country___by snow.
A Two thirds;is covered
B Two thirds;are coveres
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答案和解析
动词单复数取决于是指什么的几分之几.
Two thirds of the earth ( is ) covered with water.
earth是单数
Two thirds of the students ( are ) girls.
students是复数
选a
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