In Britain，the government，school leaders，teachers and parents all agree that students should wear uniforms．B____ British private schools have their own school uniforms．They think it's i____ for pupils to wear school uniforms．

    School leaders normally decide if pupils will have to wear a uniform，and they a____ decide what it should look like．You know，no students want to wear65．u____ uniforms．

    Everybody wants to wear beautiful uniforms．

    Leaders have to follows the rules，and they c____ just choose anything they like．They have to t____ of the students' feeling and taste．Here are a few f____ leaders should consider．

    ①Cost．This is the first fact they should consider．Their uniforms shouldn't be too e____ because it may cause problems for some families．Not all the families can afford it．

    ②Sexism（性别歧视）．The uniform policy must be equally fair（公平的）for boys and g____．

    ③Cultrues and races．School rules must a____ pupils from all backgrounds to wear a uniform，for example，allowing Muslim（穆斯林）girls to wear an appropriate dress and Sikh（印度锡克教徒）boys to wear a traditional headdress（头饰）．

已知x²+y²﹣2x﹣4y+5=0，求 $\frac{1}{4}$ （x﹣1）²﹣xy的值．