In our school library there a number of books on science and the number of them growing la

问题补充：

In our school library there a number of books on science and the number of them growing 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。