一、单项选择（共20小题, 每小题1分, 满分20分）
1.--- 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
2. ______ late made us unhappy.
A. Tom came B. Tome to come C. Tom’s coming D. For Tom to come
⒊ The music is not worth _______. I think it’s boring.
A. of listening to B. listening C. listening to D. to be listened to
