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信息发布者：
B
C
A
A
C
B
 Hi, I'm Leo. This is my father. This is my mother. And 
this is my baby brother/sister.
(1) B
(2) C
(3) A
1. ①C ②A ③B
2. Hi, I'm Leo. This is my father. This is my mother. And this is my baby brother/sister.
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