听力原文： Fifty years ago, Milton Friedman proposed a Voucher System to improve American education. Today, about 36,000 students are served by vouchers. The programs are in the city of the Washington D. C., and three of the fifty states: Florida, Ohio and Wiseonsin. The number of students will grow with 14, 000 new vouchers just approved by lawmakers in Ohio. And Utah will offer a Voucher program for disabled students. A few states offer tax credits or other forms of support to help parents pay for private schools. One objection to vouchers has to do with the fact that most private schools are religious. The Constitution separates government and religion. Voucher critics argue that the use of public money for religious schools is unconstitutional. They suggest public schools should get more money so all children can attend good schools near their home. Yet some people think all families should be offered vouchers, not just poor ones. Milton Freidman and his wife started the Milton and Rose D. Friedman Foundation to work for school choice with the goal to improve, through competition, the quality of education for all. Milton Friedman had his ninety-third birthday on Sunday. The Nobel Prize-winning economist has been talking to reporters about the fiftieth anniversary of his proposal. Mr. Friedman told Education Week that he thinks fifty years from now, all students will be served by school vouchers. The target of the voucher programs is