·Contact your local federal recreation site for more information about volunteer opportunities or visit Volunteer. gov.

　　语篇解读：本文是应用文，主要介绍了美国国家公园和联邦游憩地的年票、老年票、残障人士票以及志愿者票的相关信息。

　　21．Which pass is suitable for a healthy U. S. citizen in his seventies?

　　A．Annual Pass.　　　　　　 B．Senior Pass.

　　C．Access Pass. D．Volunteer Pass.

　　解析：选B　细节理解题。根据Senior Pass中的"For U. S. citizens or permanent residents aged 62 or over"可知，一个70多岁的健康的美国公民适合购买老年票，故选B项。

　　22．What do we know about the pass series?

　　A．Only U. S. citizens can access the series.

　　B．Ownership of Annual Pass can be handed over.

　　C．Access Pass can be got through two ways.

　　D．Volunteering guarantees Volunteer Pass.

　　解析：选C　细节理解题。根据Access Pass中的"May be obtained in person at a federal recreation site or through the mail using this application form"可知，残障人士票可以通过以下两种方式获得：在联邦游憩地亲自申请或者通过电子邮箱提交申请表申请。故选C项。

　　23．Where is the passage probably taken from?

　　A．A report. B．A poster.

　　C．A newspaper. D．A webpage.

　　解析：选D　文章出处题。根据文中的"right here online" "obtained online"可知，此文是选自网页，故选D项。

　　B

　　Matthew Dunn, a Royal Navy aircraft engineer, spotted a brown leather wallet on the pavement near a Dutch restaurant, while touring with the Royal Navy Black Cats display team.

After finding ￡450 inside along with a selection of credit cards and a driving license, he was nervous about handing the wallet over to local police, fearing its rightful owner would never get it back. So Mr. Dunn, 27, decided to personally return the wallet, which he had nicknamed Wally, to its owner, Roy Somers, 49, from South London.