问题
选择题
I will have a ______. It must be great fun.[ ]
A. 7 days holiday
B. 7-days-holiday
C. 7-day-holiday
D. 7-days-holidays
答案
答案：C
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I will have a ______. It must be great fun.[ ]
A. 7 days holiday
B. 7-days-holiday
C. 7-day-holiday
D. 7-days-holidays
答案：C