. Don’t promise anything _____ you are one hundred percent sure.
| A．if | B．after | C．in case | D．unless |
I made up my mind that under no circumstances ______ agree to such a principle.
| A．would I | B．I would | C．I will | D．will I |
—Did you enjoy yourself at the party?
—Sorry to say I didn’t. It was_________ a meeting than a party.
| A．much of | B．more like | C．less of | D．more or less |
He had little idea that it was getting so serious, __________?
| A．didn’t he | B．did he | C．wasn’t it | D．was it |
—___________ makes her different from the other students?
—Diligence, I think.
| A．How is it that | B．How is that |
| C．What is it that | D．What is that |
Not until I went through his paper _________ what rapid progress he had made in writing.
| A．I did find | B．did I find | C．I had found | D．was I found |