NA 96-12-8,10,12 请教

8. Volcanoes are divided into three main groups, based on their shape and the type of material they ____.

(A) are made

(B) made of

(C) are made of

(D) made for

答案：(C)

题干中的they前面是不是省略了which，还是that？或者说是定语从句省略的一种被动语态形式？改成正常句应该是the type of material that they are made of.？

10. ____, dolphins have no sense of smell.

(A) As known as far

(B) Known thus far as

(C) It is known as far

(D) As far as is known

答案：(D)

这里觉得是否用as far as known更顺呢？As far as is known是什么结构啊，感觉多了个谓语。

12. In 1938 Pearl S. Buck became the first American woman ____ the Nobel Prize for Literature.

(A) receive

(B) received

(C) to receive

(D) she received

答案：(C)

这里为何不可以是received作分词后置定语呢？难道因为the first 关系，这里一定要跟to do?

１　可以改成the type of material that they are made of

３　ＴＨＥ　ＦＩＲＳＴ　ＴＯ　ＤＯ　的结构

２　我也说不明白．顶一个