Many students signed up for the race in the sports meeting to be held next week.wA. 800-m

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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