In our school library therea number of books on science and the number of themgrowing larg

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。