A、Social problems. B、Governmental functions. C、Housing problems. D、Educational problems. A对话一开始，女士问男士认为政府应该最关注哪些社会司题，接下来两人就政府应该关

W:(17)Which social problem do you think the government needs to concentrate on most?
M: I think housing is a big problem. There are thousands of homeless people on the streets.
W: What do you think the government should do to solve the problem?
M: The government could provide some money for homeless people to build their own homes.
W: It would probably be very expensive.
M: I think the government can afford it. Besides, there are many advantages.(18)Homeless people would find it easier to get jobs if they had a settled address. They would learn some useful skills to find a job in the construction industry or home improvement.
W: It’s not a bad idea. But I think education is the biggest problem at the moment.(19)Schools don’t seem to have enough money to educate kids properly now.
M: If the government is to invest more money in education, it will need to raise taxes. That wouldn’t be popular with citizens.
W: Yes, most citizens want the government to pay for lots of things, but without increasing taxes.
M:(20)The government should show that it is using money efficiently. Sometimes we hear about how the government has wasted money on a project.
W: Yes.(20)The government has limited funds and must show that it is using the money responsibly.
17. What is mainly discussed in this conversation?
18. What can homeless people benefit if the problem of housing is solved?
19. Why does the woman say education is the biggest problem?
20. What should the government do on the issue of money?