I have two children and of them are working in the west of China.A. allB. bothC. neither

问题补充：

I have two children, and of them are working in the west of China.

A. all

B. both

C. neither

D. either

答案：

A. all

(答案→)B. both

C. neither

D. either

解析：两个孩子应该考虑both/neither/either，后面动词是are所以用both

翻译为“我有两个孩子， 他们都工作在中国西部。”