— Tom graduated from college at a very y
问题:
— Tom graduated from college at a very young age.
— Oh, he _____ have been a very smart boy then. [ ]
A. could
B. should
C. might
D. must
— Tom graduated from college at a very young age.
— Oh, he _____ have been a very smart boy then. [ ]
A. could
B. should
C. might
D. must