A、’Which company the man has worked for. B、What the man’s advantage and disadvantage are. C、Whether the man has any experience a

W: May I help you?
M: Yes. I would like to apply for one of these security guard positions you advertised in the local paper.
W: Good. May I ask you a few questions first?[19]Have you ever worked as a security guard before?
M: Yes. At Chaffer’s Plaza in San Francisco and at the Regency Hotel here in town.
W: How many years of experience have you had as a security guard? Have you had experience monitoring alarm systems?
M: I have had over four years of experience as a security guard. And I monitored several types of alarm systems in my previous job.
W: Very good. You seem to meet our minimum qualifications. Do you have any questions?
M: Yes. What are the wages and the hours?
W: The wages start at 8 dollars and 75 cents per hour. We have three shifts available, morning, evening and late night.
M: Good. I was hoping to get an evening job since I go to school in the mornings.
W: Well, you can write on your application that you prefer the evening shift.
M: What do I need to do now?
W: Complete this application form and bring it back to me. Then I will schedule you for another interview.
19. What does the woman want to know?
20. Why does the man want to work at night?
21. What does the woman ask the man to do now before another interview?