题目

—Monitor?              —I'm not monitor of our class．I      with the teacher until the monitor is elected．     A．will just help                B．am just to help     C．am just helping           D．have just helped 答案：C––__________ I smoke here?–– No, you __________.A．Must; can’tB．Do; can’tC．Can; can’tD．Can; don’t