Does her friendmath?A. does well inB. do good atC. do well inD. do well at

问题补充：

Does her friendmath?

A. does well in

B. do good at

C. do well in

D. do well at

答案：

A. does well in

B. do good at

(答案→)C. do well in

D. do well at

解析：句意：她的朋友擅长数学吗？do well in = be good at在……某方面做得好，擅长。所以选C。