2、Professor Smith, along with his assistants, ____ on the project day and night to meet the deadline.
I made up my mind that under no circumstances ______ agree to such a principle.
—Did you enjoy yourself at the party?—Sorry to say I didn’t. It was_________ a meeting than a party.
He had little idea that it was getting so serious, __________?
—___________ makes her different from the other students?—Diligence, I think.
Not until I went through his paper _________ what rapid progress he had made in writing.