社会主义文化最广泛的创造者是（）。
A．工人阶级
B．农民阶级
C．知识分子
D．人民群众
参考答案：D
下列化学名词正确的是( )
A．苛性钾 KOH
B．硝基笨
C．葵烷 C10H22
D．乙酸甲脂 CH3COOCH3
I'm sure you will do better in the test because you ____ so hard this year. [ ]
A. studied
B. had studied
C. will study
D. have been studying
