Was it during the Spring Break_______ you went on a trip to Suzhou?
Mary is an honest girl; I say it, ________I don't like her.
I prefer to buy a new TV rather than ________ it.
He doesn't know_________ the work by himself.
Oh, boy, why are you killing your time this way? Can’t you find something ________ doing?
—Which of the two pens are you going to buy?—I’ll buy _____of them, so I can give one to my friend.