问题补充：
—Do you think I should go to the seaside for a rest?
— .You have been busy for such a long time.
A. It depends.
B. It’s up to you.
C. What about you?
D. Why not?
答案：
A. It depends.
B. It’s up to you.
C. What about you?
(答案→)D. Why not?
解析：A. It depends.是情况而定 B. It’s up to you.有你决定 C. What about you? 你怎么样呀 D. Why not?为什么不呢，
从You have been busy for such a long time.可看出选D
