In our school library there _____a number of books on science and the number of them_______growing larger and larger.

问题描述:

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

B
第一个后面是复数,要用are
第二句的主语是the number,是一个整体,所以用is