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