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单选题
232.Which of the following sentences is INCORRECT?
A
Physics is an important school subject.
B
The United States borders Canada.
C
The Niagara Falls is in North America.
D
Mumps is a kind of infectious disease.
答案解析
正确答案：C
解析：
解析:考察主谓一致。四个选项的主语都是-s 结尾的名词,A 指的是学科名称;B 项美国 是表国名的专有名词;D 项的 mumps 腮腺炎,-s 结尾的这个疾病单词看作单数,其他还 有 arthritis,diabetes,phlebitis 等;这三项虽然都是复数形式,但只作单数用,作主语时 C 谓语动词用第三人称单数形式。 项的尼亚加拉大瀑布,是地理名称,含有不止一个瀑布, 类似的还有群岛 the West Indies、山脉 the Himalayas、海峡 the Straits of Gilbraltar、瀑布 Falls 等,通常看作复数,故谓语应用复数 are。
相关知识点：
句子正误判断，瀑布复数有问题
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