—?—Quite well thanks.A. What do you do?B. What do you think of it?C. How are you getting

问题补充：

—?

—Quite well, thanks.

A. What do you do?

B. What do you think of it?

C. How are you getting on with your math ?

D. Are you quite good at English?

答案：

A. What do you do?

B. What do you think of it?

C. How are you getting on with your math ?

D. Are you quite good at English?

解析：What do you do?你做什么工作：What do you think of it?你认为它怎么样：How are you getting on with your math ?你的数学怎么样：Are you quite good at English?你很擅长英语吗？根据下文，相当不错，谢谢。结合语境可知选C。