（）第一次提出了“存在”的概念。
A.亚里士多德
B.柏拉图
C.巴门尼德
D.德谟克利特
参考答案：C
教学系统设计
Unluckily, he was soon told _____ he discovered was unimportant to them. [ ]
A. what why
B. that why
C. what that
D. why what
