---How are you?--A. How do you do?B. Good morning！C. How are you！D. Fine thank you.

问题补充：

---How are you? ----

A. How do you do?

B. Good morning！

C. How are you！

D. Fine, thank you.

答案：

A. How do you do?

B. Good morning！

C. How are you！

(答案→)D. Fine, thank you.

解析：句意：——你好吗？——很好，谢谢你。A. How do you do? 你好；B. Good morning！早上好！C. How are you！你好吗。D. Fine, thank you.很好，谢谢你。故选D。