She had an advantage over others because she had a good of both Chinese and English. A.

问题补充：

She had an advantage over others because she had a good of both Chinese and English.

A. command

B. feeling

C. ability

D. program

答案：

(答案→)A. command

B. feeling

C. ability

D. program

解析：考查名词辨析。 have a good command of sth.精通某事故答案为A。