A、They distract children. B、They cost a lot. C、They are indispensable. D、They are dangerous. B由原文可知，男士承认手机的花费很大；女士表示赞同，并且感叹两个人至少

W: So Tom, what do you think about children today having mobile phones?
M: Mobile phones? Well, I think it could be a good thing. I mean for safety reasons.
W: Really?
M: Yes. If I were a parent, I think I would feel safer knowing that my child had a mobile phone, and I could get in touch with him whenever^ need to. And if something happens like an emergency, then he will be able to use the mobile phone.
W: It sounds reasonable. But I would argue that it is quite dangerous actually.
M: That is an interesting point. Why would you think it will be dangerous?
W: Because children don’t really have the best attention spans (注意力持续时间) anyway and often they could, for example, walk into the road whilst they are talking on their mobile phones and generally pay no attention. What if there were some cars just at that moment? So I don’t think it is very safe for them.
M: Well, that’s a good point, but that could also teach them responsibility as well. If mobile phones are unsafe, bicycles could be unsafe and toys could be unsafe. But that’s all part of growing up and I think that if you teach them responsibility, it shouldn’t be a big problem.
W: But I think fewer children these days play on bikes than they used to. I think children are more dependent upon technology, and I see that as a definite negative thing because children don’t play out as they used to. They just stay in and watch TV and play computer games.
M: True, true. I suppose so, but you know technology is a necessity in our life and in the future. If we want them to become competent (合格的，能干的) to use technology and take advantage of technology, then I think it would be a good way to start.
W: A new mobile phone will cost at least several hundred. Don’t you think they are really expensive?
M: Oh, yeah, they are.
W: It is much better to spend money on more meaningful things, like education or even entertainment.
M: I couldn’t agree more.
W: If I were a parent, I would not want my child to phone people too often because it would cost so much money.
M: Well, you could be right about that. They do cost a lot of money.
W: Oh, I’m glad you agree. Well, yeah, at least we agree about something now.
M: For sure.
6. What does the man think about children having mobile phones?
7. Why does the woman say it is dangerous for children to use phones?
8. Why does the man mention bicycles and toys?
9. According to the man, what is the advantage of children’s using mobile phones?
10. What do the two speakers agree on about mobile phones?