OG-34 关于定语从句

34. A report by the American Academy for the Advance­ment of Science has concluded that much of the currently uncontrolled dioxins to which North Ameri­cans are exposed comes from the incineration of wastes.

(A)  much of the currently uncontrolled dioxins to which North Americans are exposed comes

(B)  much of the currently uncontrolled dioxins that North Americans are exposed to come

(C)  much of the dioxins that are currently uncon­trolled and that North Americans are exposed to comes

(D)  many of the dioxins that are currently uncontrolled and North Americans are exposed to come

(E)   many of the currently uncontrolled dioxins to which North Americans are exposed come

Choices A, B, and C are flawed because the countable noun dioxins should be modified by many rather than much, which is used with uncountable nouns such as "work" and "happi­ness." In addition, both A and C incorrectly use the singular verb comes with the plural noun dioxins. Choices C and D are needlessly wordy, and D requires that before North Americans, to be grammatically complete. Choice E, the best answer, is both grammatically correct and concise.

我觉得这里D应该不能用that吧？ 我看张道真的书中说，当定语从句指代词前有介词时应该用which，且一般把介词提前，用sth to which....  ， 但OG好像认为这里用that是正确。定语从句指代词前有介词时到底ETS是认为应该用which还是that呢？或者两者都可以？ 用的时候需不需要把介词提前呢？请nn指点一二啊。

D requires that before North Americans

这里的that是和前面的that构成平行结构 A report by the American Academy for the Advance­ment of Science has concluded that much of the currently uncontrolled dioxins and that North Americans are exposed to come from the incineration of wastes.    我觉得就是加上这个thatD也不对, 逻辑意思错误

当介词提前时应该用which

那是不是说ETS并没有要求介词一定要提前呢？
sth which.... to （sth做介词宾语）也是可以的呢？

一般来说:

1.除了先行词是人或者是介词宾语之外,对物的限定性定语从句无一例外用that引导,对物的非限定性从句用which 引导,两者各司其职没有重叠和交叉

2当先行词为宾语时候一般要将介词提前,放在关系代词之前.