问题补充：
--- I’m going on a trip to Beijing soon. ---.
A. That’s all right.
B. Sorry to hear that
C. Be careful. Don’t be too happy.
D. Have a good trip.
答案：
A. That’s all right.
B. Sorry to hear that
C. Be careful. Don’t be too happy.
(答案→)D. Have a good trip.
解析：考查交际用语。That’s all right.不要谢，Sorry to hear that听说了那件事很难过，Be careful. Don’t be too happy.当心，不要太高兴，Have a good trip.旅途愉快，句意：我很快打算去北京旅行。旅途愉快。所以选D。
