A—smoke   B—are   C—care    D—either    E—quiet    F- move G—obey    H--clean   I—them    J—out     K—useful    L-- wear

 
There is a big library in my school. It is very _____to us students because we can read many kinds of book there. There _____ many rules in the school library. Firstly, we must keep ____ in the library and we can’t talk loudly. Secondly, we have to wear clean clothes and we are not allowed to _____slippers (拖鞋) there. Thirdly, we have to keep the library clean and we aren’t supposed to spit or trash everywhere. And we can’t_____ ，_____ .Fourthly, we must take ___of the books and magazines there and we aren’t allowed to write or draw on _____ . Finally, it’s necessary to care for public facilities (公共设施) in the library. We can’t _____  the desks and the chairs there.
I think it’s the duty of everybody to_____  the rules in the school library. And if we break the rules there, the library will be in a mess. Don’t you think so?