In the USA, children start school when they are five years old. In some states they must stay in school31          they are sixteen. But most students are seventeen or eighteen years old when they32         secondary(中等的) schools. There are33          kinds of schools in the USA: public schools and private schools. 34          children go to public schools. Their parents don’t have to35          their education because these schools get36          from the government. If a child goes to a 37         school, his parents have to pay 38         money for his study. Some parents 39          like private schools though they are 40         more expensive.

Today about half of the high school students41          in universities after they finish secondary schools. A student at a state university doesn’t have to pay very much 42         his parents live in that state.

Many students43         while they are studying at universities. In this way they get into 44         working habits and live45          their own hands.