How to be a Model Student 　　

       I want to be a model student. What shall I do? 　　

       I should be polite. I should study hard. I should capful and helpful. I should walk in the corridors. I should throw rubbish in the bin. I should be quiet in the library. I shouldn\'t walk and run on the grass. I shouldn\'t throw rubbish on the floor. I shouldn\'t run in the corridors. I shouldn\'t fight. I shouldn\'t be noisy in the library.