题目

 - _____ heavy the rainstorm is! -Yes, the town has experienced the most serious flood during the past ten years. A. How                B. What                     C. How a            D. What a 答案：A—I knewshe was in because I heard her radio but she didn’t open the door.— She________ the bell.A.may not hearB.may not have heardC.mustn’t have heardD.mustn’t hear