In the United States，boys and girls start school when they are five years old．In some states(州)they must stay in school until they are sixteen．Most students are seventeen or eighteen years old when they graduate(毕业)from secondary school．another name for high school．Most children go to public elementary and secondary schools(公立小学和中学)．The parents of public pupils do not have to pay for their children’s education(付学费)because taxes(税收)support the public schools．If a child goes to a private school(私立学校)，his parents have to pay for the child’s education．Today about half of the high school students go on to colleges and universities(大学)．Some colleges and universities receive money support from the government(政府)．A student at a state university does not have to pay very much if his parents live in that state．Private schools are expensive，however．Almost half of the college students in the USA work while studying．If a student’s family is not rich，he has to make money for part of his college expenses(费用)．
In American children_______ at the age of five．

A．begin to study

B．start school

C．graduate from elementary schools

D．must stay in school all the day．

High school is another way of saying______．

A．elementary school	B．secondary school
C．Public school	D．colleges and universities

Children who go to public school________．

A．must pay for their education

B．must study hard

C．don’t have to pay

D．must study for ten years

_________support(s) some colleges and university．

A．Some children’s parents	B．Many teachers
C．A few secondary schools	D．The government

In the USA almost half of the college students work while studying．This is because________．

A．their families aren’t rich enough

B．they don’t want to depend on their parents

C．they are interested in work

D．their parents don’t live in that state