I was lucky to win a gold medal in the 800-meter-raceYou through tough training

问题补充：

--- I was lucky to win a gold medal in the 800-meter-race.

--- You through tough training.

A. must go

B. should go

C. must have gone

D. should have gone

答案：

A. must go

B. should go

(答案→)C. must have gone

D. should have gone

解析：句意：——我幸运的在800米赛跑中得了金牌。——你一定经过了艰苦的训练。根据句意，与过去有关，排除ＡＢ。Must 一定，必须，must have done（过去)一定做了某事，should应该，should have done本应该做某事而实际没做，故选Ｃ