3. Designing a computer monitor requires not only an understanding of electromagnetism，chemistry，and the psychology of human vision.

　　(A) not only an understanding of

　　(B) both an understanding of

　　(C) an understanding of not only

　　(D) an understanding of both

　　(E) an understanding of

　　答案：E

　　类型：平行结构

　　解析：题目中平行的结构是electromagnetism，chemistry和the psychology of human vision。AC选项可以直接排除，因为only only和and不能连用。题目是三个名词的并列，因此both…and…这个短语也使用不恰当。BD也可以排除。

　　4. Edgar Allan Poe’s poem “The Raven,” partly inspired by a talking raven in the novel Barnaby Rudge by Charles Dickens.

　　(A) Edgar Allan Poe’s poem “The Raven,”

　　(B) Edgar Allan Poe，whose poem “The Raven” was

　　(C) A poem by Edgar Allan Poe， “The Raven”，which was

　　(D) “The Raven” by Edgar Allan Poe’s poem，being a poem

　　(E) “The Raven”，a poem by by Edgar Allan Poe，was

　　答案：E

　　类型：被动语态

　　解析：注意看到句中inspired by，这明显是被动语态的表达形式，那么inspired前面缺少一个be动词，因此AD可以直接排除。B选项，whose引导定语从句，导致主语EAP这个人没有谓语动词，因此B错。C选项which引导定语从句，但是主语依然没有谓语动词，因此C选项也错。E选项中，主语是“The Raven” ，两个逗号之间是插入语，was inspired做谓语动词。E正确。