—What would you wish to do if you were a college student again? —That's very hard to say, but I wish I___________ when I was a college student.
#89321
A
has not studied biology
B
did study biology
C
had studied biology
D
studied biology
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What a kind teacher. But for his help, I __________ my study.
#86462
A
wouldn’t finish
B
wouldn’t have finished
C
shouldn’t have finished
D
mustn’t have finished
 —No wonder you caught a cold. You ________out last night without a coat. —I know how silly I was.
#89425
A
shouldn’t have gone
B
mustn’t have gone
C
couldn’t have gone
D
mightn’t have gone
.He has just arrived, but he talks as if he _____ all about that.
#89368
A
know      
B
knows
C
known     
D
knew