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。
A
As a student, if you’re considering getting a part-time job to earn pocket money during summer or winter vacations, here are some of the good choices.
Tutor
If you’re particularly good at a subject, you might be able to get paid for helping younger students get better grades. In many cases, it’s possible to make $15 to $20 an hour. Plus, with this job, you’re able to flexibly set your own schedule. It’s a good way for students to both earn money and take part in after-class activities.
Dog Walker
As more people are becoming pet owners, the need for people to provide care services for such animals increases. Better yet, the pay is on the higher side, with dog walkers making as much as $30 for a 30-minute walk. If you are an animal lover, a job as a dog walker is suitable for you.
Babysitter
Depending on how many kids you look after, you might be able to make $12 to $15 an hour for each kid. To get more work chances, get a first aid certificate(急救证书). Some community centers offer babysitting courses, and you can charge higher prices if you have such kind of certificate. With a driver’s license, you will be more competitive. But this is not necessary.
Lifeguard
If you’re a good swimmer, lifeguard can be one of the great part-time jobs available for you. At the beginner level, you might only make $9 to $10 an hour. Once you become more experienced, you could make up to $15 to $16 per hour. If you can be a lifeguard for more than a year or two, the increased money can be very satisfactory.
21. What is a must to be a tutor?
A. Joining in activities after class. B. Attending community courses.
C. Getting excellent subject grades. D. Being experienced at swimming.
22. What advantage should you have when you apply to be a babysitter?
A. Charging a much lower price. B. Knowing first aid acknowledge.
C. Being able to work for a long time. D. Enjoying spending time with animals.
23. How much might you make for three hours as a new lifeguard?
A. $30. B. $45. C. $48. D. $60.
