题目

﹣﹣﹣Look!The man at the gate _____ be our headmaster．He is always standing there every morning． ﹣﹣﹣No，it_______ be him．He is holding a meeting in the office now．（ ） A．must； can't  B．must； mustn't C．can't； can't D．can't； mustn't 答案：A．— What ________ you usually ________ after school? ( )— I often play games with my friends.A.are; doingB.do; DoC.did; do