I think she is at dancing than singing.A. betterB. goodC. wellD. best

问题补充：

I think she is at dancing than singing.

A. better

B. good

C. well

D. best

答案：

(答案→)A. better

B. good

C. well

D. best

解析：better 更好的；good好的；well副词，好地。形容词，健康的；best最好的。联系下文than singing.可知本句表示在两个事物中进行对比，故用形容词的比较级，选A。