______of the earth ______ covered by water.A. Two thirds; is         B. Two thir

______of the earth ______ covered by water.A. Two thirds; is         B. Two thir

题型:不详难度:来源:
______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
举一反三
_______ the teachers in the school is one hundred, and ________ of them are women teachers.
A.A number of; four-fifthB.The number of; four-fifth
C.A number of; four-fifthsD.The number of; four-fifths

题型:不详难度:| 查看答案
Tree Planting Day is on ______ of March. 
A.twelveB.the twelveC.twelfthD.the twelfth

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I saw       children in the classroom, five boys and seven girls.
A.nineB.thirteenC.elevenD.twelve

题型:不详难度:| 查看答案
_____ of the water _____ polluted. We must try to protect our environment.
A.Two third; areB.Two third; isC.Two thirds; areD.Two thirds; is

题型:不详难度:| 查看答案
How much did it cost to build the science lab?  Five ____ yuan.
A. millions  B. million  C. millions of
题型:不详难度:| 查看答案
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