In the United States, boys and girls start school when they are 5 years old. In some states, they must stay in school until they are 16. Most children go to public elementary schools and secondary schools. The parents of public school pupils do not have to pay directly for their children's education, because tax money supports the public schools. If a child attends a private school, his parents pay the school for the child's education. Today, about half of the high school graduates go on to colleges or universities. Some colleges and universities receive tax money from the government. A student at a state university does not have to pay very much if his parents live in that state. Private colleges and universities are expensive, however. Almost half of the college students in the United States work while they are studying. When a student's family is not rich, he has to earn money for part of his college expenses.

Questions 15 and 17 are based on the passage you've just heard.
15. When do the children in the United States start school?
16. Which students can pay less at a state university?
17. Which of the following statements is Not true?

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