问题
选择题
We should take enough food because we have to take a ______ journey. [ ]
A. twenty day's
B. twenty days
C. twenty days'
D. twenty-days
答案
C
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We should take enough food because we have to take a ______ journey. [ ]
A. twenty day's
B. twenty days
C. twenty days'
D. twenty-days
C
