问题补充：
– Dad , when will you be free? You agreed to go to the seaside with me four days ago.
-- I am sorry, Jean. But I think I will have a holiday soon.
A. four-days
B. four-day
C. four days
D. four day
答案：
A. four-days
(答案→)B. four-day
C. four days
D. four day
解析：可联系答.案.网客服索取。
