最近总结OG12SC，关于解释的一些疑问和新想法请牛人们帮忙！

30. For members of the seventeenth-century Ashanti
nation in Africa, animal-hide shields with wooden
frames were essential items of military equipment,
a method to protect warriors against enemy arrows
and spears.
(A) a method to protect
(B) as a method protecting
(C) protecting
(D) as a protection of
(E) to protect

D Th e prepositional phrase as a protection of
warriors is awkward and imprecise

对于这个解释我理解得不是很清楚，不准确在哪呢？protecting和protection在意思上变化也不大啊？

31. Unlike the conviction held by many of her colleagues
that genes were relatively simple and static, Barbara
McClintock adhered to her own more complicated
ideas about how genes might operate, and in 1983, at
the age of 81, was awarded a Nobel Prize for her
discovery that the genes in corn are capable of
moving from one chromosomal site to another.
(A) Unlike the conviction held by many of her
colleagues that genes were
(B) Although many of her colleagues were of the
conviction of genes being
(C) Contrary to many of her colleagues being
convinced that genes were
(D) Even though many of her colleagues were
convinced that genes were
(E) Even with many of her colleagues convinced of
genes being

A Incorrect comparison between conviction
and Barbara McClintock.

我觉得除了这个错误以外，that genes were的摆放位置也不对吧，按照A的意思that genes were应该是修饰colleagues的。

33. Because an oversupply of computer chips has sent
prices plunging, the manufacturer has announced that
it will cut production by closing its factories for two
days a month.
(A) Because an oversupply of computer chips has
sent prices plunging,
(B) Because of plunging prices for computer chips,
which is due to an oversupply,
(C) Because computer chip prices have been sent
plunging, which resulted from an oversupply,

(D) Due to plunging computer chip prices from an
oversupply,
(E) Due to an oversupply, with the result that
computer chip prices have been sent plunging,

B Because which refers to plural prices,
it should be followed by are, not is.

我觉得这里which从句修饰的是computer chips所以谓语动词才应该用are的吧

题目有些多，恳请大家帮忙，谢谢！大家都一起加油啊！

30  后面那个做同位语  表面前面那个方法保护，所以用伴随状态 protecting

31  所有答案中都用were 你这样选 A UNLike比较对象不同类错  BCE都用being  being 90%以上都错 你就不要挑骨头，gmat考试是相对最优，你这样会把自己逼死胡同。

33答案是A  Because >because of & due to