You are doing great! I’ve never had answer before.A. betterB. bestC. a betterD. the best

问题补充：

You are doing great! I’ve never had answer before.

A. better

B. best

C. a better

D. the best

答案：

A. better

B. best

C. a better

D. the best

解析：考查形容词的比较等级。句意中隐含着“这个答案比以前的都好”，进行比较，用good的比较级better, answer为单数，前面再加a。故选C。