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        1. ---Must I water the flowers right now?
          ---No, you ________ . You may do it after supper.
          A. mustn't             B. needn't           C. can't
          B

          試題分析:句意:上句我必須馬上澆花嗎?下句不,你不必,你可以吃過晚飯在做。對于must 開頭的的一般疑問句用needn't作否定回答。故選B。
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