[解析]
(1)A.词义猜测题。根据第一段"They immediately end the powerful social sorting and labeling (标记) that come from clothing.If all students are dressed in the same way,they will not pay too much attention to their clothing,and some of them will not be laughed at for wearing the "wrong" clothes.(他们立即结束了来自服装的强大的社会分类和标签。如果所有的学生都穿同样的衣服,他们就不会太在意自己的衣服,有些学生也不会因为穿错了衣服而被嘲笑。)"可知,穿校服有很多的好处。因此 benefits 的意思是:好处。A.advantages 好处;B.tasks任务 C.messages信息;D.differences不同。故选A。
(2)C.细节理解题。根据第三段第三句"The uniform means to the wearer his or her special duties and sends the same message to everyone the wearer meets. (制服意味着穿戴者的特殊职责,以及穿戴者对所遇见的人传递相同的信息)"可知,制服让穿戴者时刻意识到自己的职责。故选C。
(3)B.推理判断题。根据第二段第二句"The difference is that the clothing students choose for themselves creates social barriers(障碍);school uniforms tear those barriers down. (不同的是学生自己选择的衣服制造了社会障碍;而学校制服就可以消除这种障碍)"可知,学生穿校服可以使他们感觉平等,没有差异。故选B。