根据首字母写单词：

     My name is Boris.I am an American boy. I am twelve ①y       old. There ②a     five  people ③i    

my family. My father is a ④d            . He ⑤w           in a hospital. My mother is a ⑥t             . She

⑦t             in a high school.

     I am a student ⑧o     Grade Seven. My little s           Rose is only four years old. My grandma  

doesn't have a ⑨j         . She ⑩l         after Rose at home.

简述猪气喘病的病理变化