阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

There are several reasons why school uniforms are good idea. First of all, uniforms help the school look smart. The students feel that they belong to a particular group. When every pupil in the school wears the uniform, nobody ____1____ (have) to worry about fashion(时尚). Everybody wears____2____ same style of clothes. Uniforms can be useful in unexpected ways, A school in Ireland has introduced an interesting new uniform. On the edge of the jacket, there is a piece of cloth ____3____gives off light in the dark. When the children are walking or ____4____ (cycle) to school on dark mornings, car drivers can ____5____ (easy) see them.

But can uniforms help improve school standards? The answer ____6____ this question is not clear. One study in America found that students' grades ____7____ (improve) a little after the school introduced uniforms. But some students didn't want ____8___ (wear) the uniform. Other American studies showed no ____9___(connect) between uniforms and school performance.

School uniforms are ___10_____ (tradition) in Britain, but some schools are starting to get rid of them. Some very good schools don't have a uniform policy. However, uniforms are still popular. Pupils at about 90 percent of British secondary schools wear uniforms.