给下列句子排序。(8分) ( )Do you have a library ? ( )Yes ,we do . It’s on the second floor. ( )Forty-five students. ( )No, it isn’t. It’s the teachers’ office. ( )Welcome to our school! This is my classroom. ( )This way, please. ( )Is that the computer room? ( )It’s so big! How many students are there in your class?