缺词填空根据短文内容及首字母提示，补全空格内单词，使短文完整、通顺。（共10小题；每小题1分，满分10分）
In the United States, children start school when they are five years old．In some states they must stay in school  u   they are sixteen．Most students are seventeen or eighteen years old when they l high school．There are  t  kinds of school in the United States: public school and private school．M   children go to public schools．Their parents do not have to  p   for their education because the schools receive money from the government．If a child goes to a private school, his parents  h  to pay enough money for his schooling．Some parents still choose private schools, though they are much more  e  ．
Today about half of the high school students go to universities  a   they finish the high school．A student at a state university does not have to pay too  m   if his parents live in this state．
But many students work while they are studying at universities．In this way they can have good working habits and live by their own  h  ．