阅读理解部分（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
Education is required and free for every child in the United States. Most children start school by the age of six. They attend eight years of elementary school and four years of high school (or secondary school ).The money for free public schools comes from taxes, and each state is responsible for its own educational system .State legislatures (立法机关) set the educational requirements but leave the management of the schools in the hands of the local communities .Most states require their children to go to school until a certain age. This age varies from 16 to 18 years according to the laws of the individual state. The Federal government contributes funds to the states for additional schools and schools services.
After graduation from high school, a student can start his higher education in two –year college, a four-year college, a university or a specialized professional school----either public or private. Most colleges admit students on the basis of their high-school records. The cost of a college education is expensive in private universities, but it is much less in those supported by states and cities. Many students receive scholarships from the schools, the government, or private foundations and organizations. More than 50 percent of the college students work to help pay their college expenses.
Only 2 percent of the population of the country cannot read and write.
1、Where does the money for public schools come from ?
A. From the Federal government.       B. From the state legislatures.
C. From taxes.                      D. From the parents of the school children.
2、What is the educational system in the United States based on ?
A.  The Federal government                   B. Individual school
C.  Individual state                           D. Local communities
3、What percentage of the population is illiterate (文盲) ？
A. 50                B. 2               C. 4                    D. 6
4、How are college expenses of most students paid ?
A.  They won earnings from part-time work .
B.   Scholarship from the schools, the government or private foundations.
C.  Taxes .
D.  Both A and B.