问题补充:
In our school there a number of books on science and the number of them growing larger and larger.
A. is; are
B. are; is
C. are; are
D. is; is
答案:
A. is; are
(答案→)B. are; is
C. are; are
D. is; is
解析:句意:我们学校有很多关于科学的书,这些书的数量变得越来越大。a number of 很多的,大量的,修饰可数名词复数,在句子中作主语时,动词用复数;the number of ...的数量,在句子中作主语时,动词用单数。故选B。