阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

Earn Money This Summer with Sunny Libraries! Do you have too much free time this summer vacation? Do you need a summer job to earn extra money? Do you want to be involved in your community (社区)? Sunny Area Library System (SALS) has job opportunities for high school students. These are good chances to get work experience.
Book Theater brings children' s book stories to life. It has shows at all Sunny Libraries. Applicants should enjoy performing in front of an audience and working with young children. Work Hours: Practice: Fridays  4:00 pm — 6:00 pm Performance: Tuesdays  10:00 am Rate of Pay: $16/performance	Computer Tutor helps guests to deal with technology problems, involving Internet searches and using the SALS Website to find materials. Applicants should have computer skills. Work Hours: Monday—Friday  9:00 am—5:00 pm Rate of Pay: $ 8/hour
Bookmobile helps the driver find the routes to libraries. The truck you work in is air-conditioned, and the driver is friendly. Applicants must be able to lift heavy boxes. Work Hours: Sunday and Friday  9:00 am — 4:00 pm Rate of Pay: $10/hour	Reader Desk provides service with a smile while checking materials in and out to guests. Friendly attitude and ability to work on library data system required. Work Hours: Monday—Tuesday  8:00 am—4:00 pm Rate of Pay: $ 7.50/hour

If you are interested in acting,             should be your choice.

A．Book Theater	B．Bookmobile
C．Computer Tutor	D．Reader Desk

If you get the job of "Bookmobile", you are expected to                 .

A．work with young children	B．lift heavy boxes
C．check materials for guests	D．repair computers

The purpose of the advertisement is to                 .

A．attract students to libraries	B．raise money for libraries
C．introduce new books	D．offer job opportunities