问题
选择题
A new study proves a _____ walk every day is enough to keep people away from becoming fat. [ ]
A. 30-minute
B. 30 minute's
C. 30-minutes
D. 30 minutes
答案
答案：A
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A new study proves a _____ walk every day is enough to keep people away from becoming fat. [ ]
A. 30-minute
B. 30 minute's
C. 30-minutes
D. 30 minutes
答案：A