Oliver is talking about uniforms

   a girl      a skirt      black shoes      cardigan      dark colours      grey socks      grey trousers      must      navy blue      pair of trousers      pullover      school emblem      you are representing   

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School uniforms for a boy normally consist of a , a polo shirt, and a which has the on it. Most school uniforms come in like mine was in England. For school, I had to wear or shorts, a white polo shirt, a jumper, and .
School uniforms for are similar to a boy's uniform, except they can wear or a rather than trousers and a pullover.
The school emblem that is on your school uniform shows which school you attend. Therefore, when wearing your uniform off premises, you behave because your school.