A、About 10 months. B、No more than one year. C、About 4 years. D、About 3 months. C对话中女士提到自己怀孕后一直没有工作，现在孩子已经三岁了。由此可以推测她有四年左右的时间没有工作

W: Good morning. I read the recruiting ad in the paper yesterday morning. I wonder if there are still openings in your company.
M: Well, let me check. OK, we still need several cashiers and waitresses.(19)You know the supermarket we run is very busy. We are actually understaffed. Which position would you like to apply?
W: Cashier, I think. Can I have a try?
M: All right. In that case, when would you be available? We actually hope the experienced applicant to come to work as early as possible.
W: I do prefer to start early.(20)I haven’t worked for long time after being pregnant. Now the baby’s already 3 years old. I’m quite sure I’m capable of a full-time job.
M: By the way, did you have any relevant working experience? We want experienced applicant.
W: Yes.(21)I worked as a cashier in a manufacturing company for three years and I’m quite skillful in using computer. Last year, I took a course on accounting for 3 months.
M: That’s great. What else do you want to know about the job?
W: I’d like to know the specific working hours and the salary.
M: Oh! You have to work five days a week and 8 hours a day.(22)And you can get at least $2,000 each month. If you think that is acceptable, come to work tomorrow.
W: No problem. See you tomorrow morning.
M: See you.
19. Why does the company need to recruit new workers?
20. How long hasn’t the woman worked so far?
21. What experience does the woman have?
22. What do we learn about the job the woman is applying?