他去年春天参加了伦敦马拉松。

He participated in the London ___marathon last spring.

她在不到三小时内完成了她的第一次马拉松。

She ran her first ___marathon in just under three hours.

如果我想明年跑马拉松，每周需要训练多少小时？

How many hours of training per week are necessary if I want to run the ___marathon next year?