In our school libray therea number of books on science and the number of themgrowing large

问题补充：

In our school libray,therea number of books on science and the number of themgrowing larger and larger.

A.is;are B.are;is C.have;is

答案：

解析：表示在某地有用there be，a number of表示许多的意思，后跟可数名词复数，故第一个空填are，the number of表示是什么的数量，主语为单数，故be用is，故本题选B。