In our school library there a number of books on science and the number of the books grow

问题补充：

In our school library, there a number of books on science and the number of the books growing larger and larger.

A. is, are

B. are, is

C. have, is

D. are, are

答案：

A. is, are

(答案→)B. are, is

C. have, is

D. are, are

解析：句意：在我们学校图书馆，有许多关于科学的书，书的数量越来越多。a number of 许多，相当于 many，修饰可数名词复数。作主语时，谓语动词用复数。number可用large，small等修饰，以表示程度。

； the number of……的数量，跟复数名词连用作主语时，中心词是number，谓语动词要用单数。故选B。