—Well, honey, I'm sorry but I have to board on.
—____ , and God bless you when you are in
A. Enjoy yourself B. Do take care C. Have a nice trip D. Mind your steps
知识点：情景交际
B
Check your answers carefully and make some changes ____.
A. if it necessary B. if you are necessary C. if is necessary D. if necessary
知识点：固定句型
D