问题补充:
Many students signed up for the race in the sports meeting to be held next week.w
A. 800-meter-long
B. 800-meters- long
C. 800 meter length
D. 800 meters length
答案:
(答案→)A. 800-meter-long
B. 800-meters- long
C. 800 meter length
D. 800 meters length
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