________ how others react to the book you have just read creates an added pleasure.
—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.
I don’t remember how many years ago _____ I was taken to Beijing for the first time.