Although the term "psychopath" is popularly applied to an especially brutal criminal, in
psychology it is someone who is apparently incapable of feeling compassion or the pangs
of conscience.
(A) it is someone who is
(B) it is a person
(C) they are people who are
(D) it refers to someone who is
(E) it is in reference to people
答案是D. og中有一句这样的解释：E omits a main verb, such as
applied, that, in grammatical context here, is required after is. Also, the
word people incorrectly shifts number from singular to plural.
就是说people从来就当复数看，没有单数的意义是么？
谢谢！ | 
