单项选择题
American schools are divided into（）
A.public schools and private ones B.Public schools,private schools and community schools C.coeducation schools and single sex schools. D.national schools and state-run schools
单项选择题 Elementary and secondary education is（）
单项选择题 To many Americans,education is important because（）
单项选择题 Since 1991,the goals set in the plan（）
