— Tom graduated from college at a very young age. — Oh, he _____ have been a very smart bo...
—Tomgraduatedfromcollegeataveryyoungage.—Oh,he_____havebeenaverysmartboythen.[]A.coul...
— 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
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