The number of people visiting the exhibition 50 and a number of them painters.A. was; w

问题补充：

The number of people visiting the exhibition 50, and a number of them painters.

A. was; was

B. were; was

C. was; were

D. were; were

答案：

A. was; was

B. were; was

(答案→)C. was; were

D. were; were

解析：本题第一空的主语是the number of…“…的数量”，该短语作主语的时候，谓语动词使用单数形式was。第二空前面的名词是代词them,这里的them指代people，a number of许多，大量；通常修饰可数名词复数形式，谓语动词使用复数形式were。句义：参观本次展览的人的数量是50。他们中的很多人都是艺术家。故C正确。