Jack wasn’t saying anything,but the teacher smiled at him________he had done something very clever. (2011·湖南,33)
_________the answer, the boy, who asked the question, still stood with his hand ______.
I don’t mind _____ the decision as long as it is not too late.
An old lady came _________ to the bus stop, only _______ the bus had gone.
Do you _________ or serve in an organization or are you a member of some group?
Since production has risen ________, the personal income has increased year by year.