【题目】____ number of books sold this month _____2000.
A. A; has reached B. The; has reached
C. A; have reached D. The; have reached
在线课程【答案】B
【解析】B考查主谓一致。句意：本月售出的图书数量已达2000. 短语the number of… 意为：…的数目，加可数名词复数作主语，谓语的动词用单数形式；a number of…很多，大量，后边加可数名词复数，谓语动词用复数形式。故选B。