问题补充:
In our school library therea number of books on science and the number of themgrowing larger and larger.
A. is , are
B. are , is
C. has , is
D. have , are
答案:
A. is , are
(答案→)B. are , is
C. has , is
D. have , are
解析:There be句型表示“某地(或某时)存在有某人(或某物),而并非某地(某人、某物或某时)拥有什么东西”,句中有若干个名词作主语,动词be常与后面主语中的第一个名词在数上一致。have一般表示某人有某物。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。