阅读下列短文, 从每题所给的A、B、C和D四个选项中, 选出最佳选项。
A
Summer Science Camp Instructors
Palo Alto Junior Museum &Zoo-Summer 2022 Camp Season
The Palo Alto Junior Museum &Zoo is currently looking for Camp Instructors to help facilitate its summer science camps which operate from June 15th through August 14th. These programs feature week-long full-day camps exploring a variety of science topics in the Life, Physical and Earth Sciences, and camp participants range in age from Preschool through Grade 6.
In addition to staffing science camps, Instructors are needed to support after camp programs at Rinconada Park. After camp programs offer campers an opportunity to wind down after a busy day of learning, and feature recreational activities, games, art making, and weekly trips to the Rinconada Poo1.
For more information about specific offerings, please visit www. Cityofpaloalto. or/Enjoy to review the City of Palo Alto’s camp catalogue．
Requirements：
Successful applicants will be at least 18 years old and available the entire summer--from June 15th through August 14th. They will have an interest in science, teaching, or child development, and will love working with children in an educational setting. This is a great position for college students or high school seniors．
Hours of work：
Science Camp：Monday through Friday, approximately 8 am-4 pmeach day
After Camp：Monday through Friday, approximately 1:30 pm-6:30 pmeach day
Pay：$19.29-$23.67 per hour
Note：All staff are required to be fully vaccinated and boosted，and to wear a mask at all times out of consideration for COVID-19 pandemic.
Interested applicants are invited to forward their resume and email of interest to the Education Director, Alex Hamilton. The City of Palo Alto is an Equal Opportunity Employer. People of diverse backgrounds and abilities are encouraged to apply.
21. Who is the Summer Science Camp designed for?
A. Camp instructors． B. Children under Grade 6．
C. Physical and Earth Scientists． D. Teenage children．
22. Which of the following will be required if you apply for the job?
A. Previous experience． B. Science degree．
C. At least 18 years old． D. College education．
23. What is the writer's purpose in writing the text?
A. To inform. B. To describe. C. To persuade. D. To entertain.
