A、By the introduction of her friend. B、By a phone book. C、By a "Tutor Wanted" notice. D、By an advertisement on the Internet. C题干

M: Where are you going, Catherine? Today is Saturday.
W: Saturday isn’t a holiday for me anymore. (19) I have to tutor for three hours every Saturday afternoon.
M: That’s great. I wish I could find a part-time job to make a little pocket money. How did you find this job?
W: (20) I saw a "Tutor Wanted" notice stuck on a light pole near the bus stop. I phoned the number and I got the job. It’s not too hard to find a part-time job these days. But Richard, studying should always come first. Do you think that you have enough time to handle a part-time job?
M: It’s hard to say. If I can get a job, I will try very hard to make good use of my time.
W: We do spend too much time hanging around and doing nothing. Richard, your English is perfect. Why don’t you find a job teaching English?
M: But I don’t have any teaching experience. Speaking and teaching are two different things.
W: I don’t have any experience either. People know the fact that we’re just students. But we are young and energetic , and the most important thing is that we don’t ask for as much pay as professional teachers do.
M: OK! Where should I start?
W: (21) You can post some notices on the community bulletin board and some other places. But remember; don’t post them on the wire poles because you’ll probably be fined for it.
M: Thank you for your advice, Catherine.
W: My pleasure. Good luck.
19. What do we learn about the woman?
20. How did the woman find the part-time job?
21. What does the woman suggest the man do when starting to find a job?