— I'm going to Hongkong University for further study.— You've been dreaming to study in

问题补充：

— Im going to Hongkong University for further study.

— Youve been dreaming to study in Beijing.

A. Why not Tsinghua?

B. Good luck!

C. Congratulations!

D. Good idea!

答案：

(答案→)A. Why not Tsinghua?

B. Good luck!

C. Congratulations!

D. Good idea!

解析：根据后半句的意思：你一直梦想在北京学习。可以看出第二个人对于第一个人去香港大学难以理解。故选择A。