单项选择题
The universities that offer doctoral degrees are（）
A.research universities B.doctoral universities C.A and B and some specialized institutions D.Both A and B
单项选择题 Higher education in the United States consists of（）types of institutions.
单项选择题 High schools are made up of（）different types of schools with somewhat different tasks.
单项选择题 The governing board of school district is responsible for（）
