问题
选择题
Every morning Mr. Smith takes a __________ to his office.[ ]
A. 20 minutes walk
B. 20 minute’s walk
C. 20-minutes walk
D. 20-minute walk
答案
答案：D
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Every morning Mr. Smith takes a __________ to his office.[ ]
A. 20 minutes walk
B. 20 minute’s walk
C. 20-minutes walk
D. 20-minute walk
答案：D