I took part in the ____ in the sports meeting last week.

A.800-meter-long  B. 800-meters-long  C. 800 meter long    D. 800 meters long

I took part in the ____ in the sports meeting last week.

1. A.
   800-meter-long
2. B.
   800-meters-long
3. C.
   800 meter long
4. D.
   800 meters long