A、Unlimited weekday minutes. B、1,000 free anytime minutes. C、1,000 free weekday minutes. D、1,000 free weekend minutes. C对话提到，这个手

W: Dad, you always love me, don’t you?
M: Sure. But, wait, wait. What’s on your mind?
W: Well, I saw this great offer for a free cell phone here in the newspaper, and...
M: Free? Nothing’s ever free.
W: Well, the phone is free... after a $5 mail-in rebate.
M: Ah, so that’s the catch. And why do you need a cell phone anyway?
W: Dad, all my friends have one. I can use it to call you in case the car breaks down.
M: Have you considered the fees?
W: The monthly charge for this service is only $29.99, with 1,000 free weekday minutes nationwide, and unlimited weekend minutes. Plus, unlimited, anytime minutes for anyone using the same service.
M: I don’t know.
W: And you can roll over the extra minutes to the next month instead of just losing them. What do you think of that?
M: Yeah, but what is the term of the service agreement?
W: It’s only for a dozen months.
M: But what if you cancel early?
W: Um... Ah, there’s a cancellation fee of $200, but with...
M: Two hundred bucks!
W: Yeah, but you won’t have to worry about me while I’m driving the new car.
M: New car? What new car?
W: The new car you’ll need to buy so I can use the cell phone. I mean, what’s going to look like if I’m using a cell phone in our old car.
M: Teenagers. What’ll they think of next?
19. What reason does the girl give for needing a cell phone?
20. What is one major feature of this calling plan?
21. What is the term of service for this plan?
22. What if the girl wants to cancel the phone service before expiration?