5. Write out one extra word from each group.

Решение:

Добавляем по одному слову в каждую группу, подходящему по смыслу.

1. hockey, gymnastics, skating, figure skating, football
2. football, basketball, skiing, netball, baseball
3. swimming, boxing, judo, wrestling, fencing
4. track and field athletics, weightlifting, gymnastics, run marathon, swimming
5. swimming, sailing, synchronised swimming, skiing, diving
6. speed, strong, patient, accurate, agile
7. to win, run, to master, to lose, compete
8. competition, a marathon, a team, a sprint event, championship

Ответ: football, baseball, fencing, swimming, diving, agile, compete, championship.