单项选择题
When you play a game, the person with whom you are playing against is your ______.
单项选择题 Mr. Smith ______ be in New York because I saw him in town only a few minutes ago.
单项选择题 The residents, ______ had been damaged by the flood, were given help by the Red Cross.
单项选择题 Don"t have your schedule ______; stay with us in this class.
