Which of the following sentences is INCORRECT？（2014)A．Physics is an important school subje
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Which of the following sentences is INCORRECT？(2014)
A．Physics is an important school subject.
B．The Niagara Falls is in North America.
C．The United States borders Canada.
D．Mumps is a kind of infectious disease.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
2014年第54题。本题考查主谓一致和．s结尾的名词。A项physics是指物理学，是以-s结尾的学科类名词，谓语动词应该使用单数形式；D项mumps腮腺炎，就是以一s结尾的疾病类名词，谓语动词用单数；以一s结尾的专有名词中，GeneralMotors，theNetherlands，theNewYorkTimes，theUnitedNations等，一般用单数形式；但有些表示群岛、山脉、瀑布等的专有名词往往作复数用。故C项正确，而B项语法错误。