I really regretted wasting the hours when I______ hard, but it was too late.
A: must have studied
B: could have studied
C: need have studied
D: should have studied
A: must have studied
B: could have studied
C: need have studied
D: should have studied
举一反三
- He spoke English well. He _____the language for years. A: should have studied B: ought to have studied C: must have studied D: could have studied
- （） hard, I would have gone to college. A: If I studied B: Did I study C: If I have studied D: Had I studied
- I _______ last night, but I went to the concert instead. A: must have studied B: might study C: should have studied D: would study
- I always regretted not_________ harder when l was young． A: studyin9 B: having studied C: to study D: D to have studied
- I have always regretted ______ studied harder at school. A: not to have B: not having C: to have not D: having not