作者：英吉
For the best extraction of the flavor of saffron threads, it should be soaked in liquid after being pounded with a mortar and pestle.
(A) For the best extraction of the flavor of saffron threads, it should be soaked in liquid after being pounded
(B) To best extract their flavor, saffron threads should be soaked in liquid after pounding
(C) The best way to extract the flavor from saffron threads is soaking them in liquid after being pounded
(D) The best way to extract the flavor from saffron threads is to soak them in liquid after pounding them
(E) The flavor of saffron threads can best be extracted by soaking it in liquid after pounding it
原文意思：为了提纯一个东西，threads必须被pound之后被soaked
题目分析：A说为了提纯，我希望后面马上告诉我正事，不能再绕了，而后面说it，没有说正事，继续绕，干掉。
B前面绕了一下，逗号后面说正事了，前面没问题，但是后面用pounding，按照B的表达形式pound这个动词显然是threads干的，可是thread这个词汇在语义上做不出pound这个动作，干掉。
C后面说being pound，前面的主题不是thread而是the best way，不应该用被动，如果前面的主体是threads后面用被动还凑合，干掉。
Dsoak和pound的发起者都很清楚，虽然连续出现两个them，这个them指代的是同一个东西，就是threads，没什么问题，留着。
E用soaking就会使soak这个词使the flavor干的了，发起者不对，干掉。
