-- I am going to Shanghai for a holiday.A. Goodbye.B. Have a good time.C. Please

问题补充：

---- I am going to Shanghai for a holiday.

---- .

A. Goodbye.

B. Have a good time.

C. Please go slowly.

D. Welcome back.

答案：

A. Goodbye.

(答案→)B. Have a good time.

C. Please go slowly.

D. Welcome back.

解析：句意：---我要去上海度假。---祝你过得愉快。A.Goodbye. 再见；B. Have a good time. 玩得高兴；C. Please go slowly. 请慢走；D. Welcome back.欢迎回来。由句意可知表示祝愿，选B。

考点: 考查交际英语的用法。