【正确答案】 D

【答案解析】[解析] We know that we have to pay for what we get. If we buy food, We know there will be a bill to pay. These are private bills. But there are also public bills that must be paid. Public bills are paid by the government. In turn we get these services through taxes. What would happen if everyone in the city stopped paying taxes? The water supply would stop; water might become unclean and impure. The streets might not be cleaned. There would be no police force to protect people and property. Schools would be closed. People would become sick and diseases might spread. We should not want to live in such a city. We all want pure water and food, clean streets and good schools. We want the police to prevent crime. The chief duty for every government is to protect persons and property. More than three quarters of the money spent by our government is used for this purpose. The next largest amount of public money goes to teach and train our citizens. Billions of dollars each year are spent on schools and libraries. Public money is used to pay the teachers and all the public officials. A large number of public funds are also spent on roads. The greatest part of necessary funds is raised by taxes. A tax is money that we all must pay to support the government. The law orders us to pay taxes. We have no choice in the matter. Almost everyone pays some taxes in one form or another. How does the government pay for public bills? 综合推断题。文章开始便指出政府要利用税收来支付公共账单，所以D正确。

【正确答案】 D

【答案解析】[解析] According to the speaker, what would NOT happen if nobody in the city paid taxes? 信息明示题。文章提到如果没人纳税，城市就会断水，将没有人打扫街道，没有人管理治安，学校也会被关闭，惟独没有提到人们会高兴，所以选D。

【正确答案】 B

【答案解析】[解析] Which of the following costs the largest amount of public money according to the speaker? 信息明示题。文章提到政府的主要职责是保护人民和财产安全，即维护公共安全，而政府将超过四分之三的钱都用于该目的，所以B正确。