How I wish I had worked harder before the examinations.—If you had, you _____them already.[ ]

___________ makes her different from the other students?—Diligence, I think.

Whatever he explained, he couldn’t ____ the policeman that he was innocent．

I can’tmake a decision now. I need ____ more time to think it over.

I’ve never read a better book than this one_____, it is the best one that I have ever read.[ ]