问题
选择题
May Day is coming. We'll have _____ holiday.[ ]
A. seven day
B. a seven-days
C. seven day's
D. a seven-day
答案
答案：D
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May Day is coming. We'll have _____ holiday.[ ]
A. seven day
B. a seven-days
C. seven day's
D. a seven-day
答案：D