--- I was lucky to win a gold medal in the 800-meter-race.
--- You __________ through tough training.
A．must goB．should goC．must have goneD．should have gone
C

試題分析：句意：——我幸運的在800米賽跑中得了金牌。——你一定經(jīng)過了艱苦的訓練。根據(jù)句意，與過去有關，排除ＡＢ。Must 一定，必須，must have done（過去)一定做了某事，should應該，should have done本應該做某事而實際沒做，故選Ｃ
點評：情態(tài)動詞+have done ,表示對過去的虛擬或推測。記住這些結構的意思：shouldn’t have done 本不應該做某事，實際上卻做了；needn’t have done本不需要做某事，實際上卻做了。can’t/couldn’ t have done不可能做了某事，
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