My best friend is good swimming but I do well running.A. at; inB. in ; atC. at; atD. in;

问题补充：

My best friend is good swimming, but I do well running.

A. at; in

B. in ; at

C. at; at

D. in; in

答案：

(答案→)A. at; in

B. in ; at

C. at; at

D. in; in

解析：在英文中表示擅长做某事可写成be good at或do well in，故选A.