听录音，选择。
(    )1. A.                            B

(    )2. A.                                B
        
(    )3. A.                                B
                   
(    )4. A.                                B
  
(    )5. A.                                B
        
(    )6. A                                  B
                   
1. B   2. A   3. B   4. A   5. A   6. A
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