Would you tell me what subject you were good school?A. at atB. in inC. for forD. with wi

问题补充：

Would you tell me what subject you were good school?

A. at at

B. in in

C. for for

D. with with

答案：

(答案→)A. at at

B. in in

C. for for

D. with with

解析： be good at 意为“擅长于”，at school 意为“在校，在学校读书”。