Einstein’s Theory of Relativity is so that most of us can not understand it.A. controversi

问题补充：

Einstein’s Theory of Relativity is so that most of us can not understand it.

A. controversial

B. abstract

C. appropriate

D. universal

答案：

A. controversial

(答案→)B. abstract

C. appropriate

D. universal

解析：考查形容词：A．controversial有争议的B．abstract抽象的， C．appropriate适当的， D．universal普遍的，句意：爱因斯坦的相对论是如此的抽象，以至于大部分人几乎不能理解。选B。