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In our school library there ____ a number of books on science and the number of them ____ growing larger and larger.
A.is; areB.are; isC.is; isD.are; are
B

试题分析:a number of一些,许多;the number of……的数目。句意:我们学校图书馆有许多有关科学的书籍,并且他们的数目变得越来越大。结合语境可知前文主语为复数形式,故系动词用复数。下文主语number表示抽象含义,故谓语动词用单数,选B。
点评:由number构成的这两个短语是经常考查的对象,其一般解题原则是先区分这两个短语的含义,然后结合语境选择正确答案。其结构,含义比较固定,熟记即可。
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