[解析]
(1)细节理解题。根据文章第一段Summer Camp meets for a five﹣day week,Monday through Friday. (夏令营一星期开营五天,周一至周五。)可知,夏令营每周放两天假。A.It will last for more than two months.它将持续两个多月;B.It is targeted at teenagers aged 15 and above.它的目标是15岁及以上的青少年;C.It offers campers a two﹣day break every week.它每周为露营者提供两天的休息时间;D.Its teachers are from the S.Dillon Ripley Center.它的老师来自S.Dillon Ripley中心。故选C项。
(2)段落大意题。根据文章第二段Serving as a YTA provides an outstanding way for teens to be involved with a national organization,the Smithsonian Institution.Assisting a professional Instructor,YTAs are introduced to the world of teaching.The wide range of programs offers YTAs the opportunity to experience and learn about subjects such as art,science,or theater.YTAs earn community service credits and also have an interesting experience to add to an application for college or a future job.(作为YTA为青少年提供了一个参与国家组织——史密森学会的绝佳途径。在专业教师的协助下,YTAs被引入到教学的世界。广泛的课程为YTAs们提供了体验和学习艺术、科学或戏剧等学科的机会。YTAs们可以获得社区服务学分,还可以在申请大学或未来的工作时增加一段有趣的经历。)可知,第二段主要讲了关于YTA的好处。故选A项。
(3)细节理解题。根据文章第五段Arrive at 8:15 a.m.on Mondays and 8:30 a.m.the rest of the week. (周一早上8点15分到,其他时间早上8点30分到。)可知,作为青年助教,应该在周一早到15分钟。故选D项。
(4)文章类型题。根据文章第一段We are currently looking for responsible teenagers and young adults to assist with Summer Camp. (我们目前正在寻找有责任心的青少年和年轻人来协助夏令营。)可知,文章是招聘青年助教的广告。故选B项。