–I am going to Hai’nan with my family for the winter vacation.–!A. Have a good time B. My

问题补充：

–I am going to Hai’nan with my family for the winter vacation.

–!

A. Have a good time

B. My pleasure

C. Best wishes to you

D. Thanks a lot

答案：

(答案→)A. Have a good time

B. My pleasure

C. Best wishes to you

D. Thanks a lot

解析：Have a good time祝你玩得愉快；My pleasure 我很荣幸；Best wishes to you向你致以美好的祝愿；Thanks a lot多谢。根据上文，这个寒假，我要和我的家人去海南度假。结合语境可知选A。