问题
选择题
The number of books in the bookshop is about 10,000 and a number of them
about science.
A．is
B．was
C．are
D．Were
答案
答案：C
考查动词的用法。依据第一句中的谓语动词“is（一般现在时）”可推断出第二句的时态也应是一般现在时，故保留A和C项；由短语“a number of...”的谓语动词是复数，故选C。