选出你所听到的句子。
(     ) 1. A. This is a letter.      
(     ) 2. A. May I help you?        
(     ) 3. A. It's too small for you.
(     ) 4. A. Sure.                   		B. This is a gift.  
B. Can I help you?  
B. It's too big.    
B. You're welcome.  
1. B    2. A    3. A    4. B
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