The young man is Edison in our factory and he has made number of important inventions ov

问题补充：

The young man is Edison in our factory and he has made number of important inventions over the years.

A. an; the

B. an; a

C. \; the

D. \; a

答案：

A. an; the

(答案→)B. an; a

C. \; the

D. \; a

解析：考查冠词，人名前面加不定冠词，表示一个象…的人，第二空填a，词组a number of“许多”，句意是：年轻人是我们厂的爱迪生，这么多年他发明了很多重要的东西。选B。