of the workers in this factory is about two hundred. of the workers are working hard.A. Th

问题补充：

of the workers in this factory is about two hundred. of the workers are working hard.

A. The number;The number

B. A number;A number

C. The number;A number

D. A number; The number

答案：

A. The number;The number

B. A number;A number

(答案→)C. The number;A number

D. A number; The number

解析：句意：这个工厂的工人数大约两百。很多工人工作努力。the number of……的数量，a number of很多，许多。故选C。