Maybe if I_____ science, and not literature then, I would be able to give you more  help. 
#86597
A
studied
B
wouldstudy
C
hadstudied
D
wasstudying
推荐题目
—Catherine, I have cleaned the room for you.—Thanks. You _________it. I could manage it myself.  
#89249
A
needn’t do
B
needn’t have done
C
mustn’t do
D
shouldn’t have done
______ him well, I would have invited him to my birthday party.
#87956
A
Had I known
B
Should I know
C
If I know
D
If I knew
Who would you rather ______ you repair your CD player?
#89502
A
help
B
helped
C
helping
D
to help