根据下面的对话内容,在横线上填入恰当的句子,使对话通顺,结构完整。A: Hello, Cindy! {#blank#}1{#/blank#}
B: I'm fine, thanks.
A: {#blank#}2{#/blank#}
B: My favorite subject is science.
A: {#blank#}3{#/blank#}
B: Because it's difficult but interesting.
A: {#blank#}4{#/blank#}
B: Mr. Lin is my science teacher. We like him very much.
A: Oh, Mr. Lin. Today is Friday. It's Mr. Lin's birthday. I know he'll have a
birthday party tonight.
B: Let's go to his birthday party.
A: {#blank#}5{#/blank#}