--- Our family are traveling to Taiwan Island this vacation.
--- !
A. Congratulations
B. See you later
C. Have a great time
D. Be careful
网友回答
A. Congratulations
B. See you later
(答案→)C. Have a great time
D. Be careful
解析：A.Congratulations恭喜你 B. See you later再见C. Have a great time玩的开心 D.Be careful小心；句意：我的家人这个假期去台湾岛旅行。祝你玩的愉快。故选C