—Dad, when will you be free? You agreed to go to the seaside with me four days ago. —I'm sorry, Jack. But I think I will have a _______ holiday soon. [ ]
A.
four-days
B.
four-day
C.
four days
D.
four day
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举一反三
【单选题】According to the passage, the best way to make up for sleep deficit is ______.