Seeing the policeman, the thief was behaving __________ nothing had happened.
My parents kept their _____and took me to Shanghai, where we had ____.
Every time the father comes into his room, the boy pretends ______ earnestly.
It is a pity that none of the ______ stopped ______ the poor man lying there, begging.
I went to the newly-built super-market and found there was nothing worth_____.
Don’t come in unless ________.