阅读理解。 American schoolchildren often wear uniforms if they attend religious or other private schools. Most public schools do not require uniforms. But over the last ten years or so, more of them have moved in that direction, including high schools. Another option is that students may just have to dress alike - for example, white shirts and dark colored pants or skirts. Even schools that do not require uniforms generally have a dress rule about what they consider acceptable. Schools commonly forbid clothing that shows images or words causing displeasure, or simply too much skin. Hats may be forbidden because, for example, different colors may be connected with bad guys. Some parents like the idea of uniforms. Some say it means they do not have to spend much on clothing for their kids. Others, though, argue that uniforms represent an unnecessary cost. There are also debates about whether uniforms or other dress rules go against civil rights. Students and parents have taken legal action against school dress requirements. At the beginning of this July, a middle school was asked to stop its dress rule unless families have a way out of it. The American Civil Liberties Union of Northern California brought the case for the families of several students who had been punished by the school. Most attention centered on a girl who wore socks with the Tigger character from Winnie the Pooh. The school said its clothing rules, including no pictures of any kind, were needed to control a growing problem with gangs. The families argued that the policy went against free speech rights as protected by the United States and California constitutions (宪法). The United States Supreme Court says student expression is protected as long as it does not harm the work and the rule of a school. But some educators believe dressing alike helps improve student learning. They believe that uniforms help create a sense of unity and reduce the risk of fights. They also say uniforms make it easier for security reasons to tell if someone belongs to the school or not. 1. According to the passage there is a trend(趋势) in the USA that ______. A. most public schools do not require uniforms B. most public schools move in the direction of requiring uniforms at church C. most schools require the students to be dressed in white shirts and dark colored pants D. more and more schools have a dress rule about what are suitable for schoolchildren 2.Which of the following is NOT a reaction mentioned to the dress rule? A. Some parents like the rule which means they could spend less on clothing for the kids. B. Some parents think the rule has nothing to do with them. C. Some parents say that uniforms are an extra cost for them. D. Some others argue that uniforms or other dress rules go against civil rights. 3. What is the girl's problem? A. She brought her pet called Tigger to school. B. She put Tigger into her shoes in class. C. She wore socks with pictures. D. She had a problem with some gangs. 4. School dress requirements can benefit schools and students except to help ______. A. the court protect student expression B. students focus on their studies C. make a united effort to avoid fights D. strengthen campus security