单项选择题
Board of trustees is composed chiefly of laymen because（）
A.they are more likely to represent public interests B.they have more commonsense and less professional bias C.their interests are affected by board decisions D.None of the above
单项选择题 The universities that offer doctoral degrees are（）
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.
