--I'm calling to say goodbye. I'm flying home tomorrow.
-- .
A. I'm sorry to hear that.
B. Congratulations!
C. I'm not sure.
D. Have a nice trip!
网友回答
A. I'm sorry to hear that.
B. Congratulations!
C. I'm not sure.
(答案→)D. Have a nice trip!
解析：可联系答.案.网客服索取。