NN啊，NN，请进来指导一下吧~~

OG11-15. The Iroquois were primarily planters, but supple­menting their cultivation of maize, squash, and beans with fishing and hunting.

(A) but supplementing

(B) and had supplemented

(C) and even though they supplemented

(D) although they supplemented

解释中说C的even though creates a sentence fragment怎么看不出来是fragment 啊？

12. After gradual declension down to about 39 hours in 1970, the workweek in the United States has steadily increased to the point that the average worker now puts in an estimated 164 extra hours of paid labor a year.

(E) Following gradually declining

答案是D。

OG的解释说 after是介词 declining是分词。

可是介词后只能跟n/动名词阿。这个分词是怎么回事呢？

13. As Hurricane Hugo approached the Atlantic coast, it increased dramatically in strength, becoming the tenth most intense hurricane to hit the United States mainland in the twentieth century and most intense since Camille in 1969.

(A) most intense since Camille in 1969

(B) most intense after Camille in 1969

(C) the most intense since Camille in 1969

(D) the most intense after 1969, which had Camille

答案D。MM们能说说since 1969和 after1969的区别吗，为什么用since 1969更好呢？

14. The commission has directed advertisers to restrict the use of the word "natural" to foods that do not contain color or flavor additives, chemical preserva­tives, or nothing that has been synthesized.

       (B) or that has been

         (D) or anything that has been

答案是D，但是OG对于B的解释说：that has been distorts the meaning by referring to foods, rather than to something added to a food.

不明白这句话怎么理解？

that在这里是代词指代foods ，也应该用those啊？还是引导定语从句，指代谁啊？

that 很容易被人认为是现行词

and是要引领一个并列主句的,而even though只引出一个从句,却没有主句,所以是sentence fragment.

因为since可以表示从那会儿一直到现在, 所以更合乎句意.

After doing sth, 是"法定的"固定用法. 尽可以用,到哪里都不会有问题!

136. Although schistosomiasis is not often fatal, (it is so debilitating that it has become an economic) drain on many developing countries.
(A) it is so debilitating that it has become an economic
(B) it is of such debilitation, it has become an economical
(C) so debilitating is it as to become an economic
(D) such is its debilitation, it becomes an economical
(E) there is so much debilitation that it has become an economical
这道题正确答案是a，没有问题。

但是C解释说：the construction soX as to Y is not a correct idiom.为什么这么说阿？

但是我觉得如果C答案的倒装没有问题（我觉得没有问题），好像还是SO..AS TO 比较简洁。而且本题中AS TO 后面的成分的逻辑主语和主句的主语一致。
请教为什么。

 so.. ...as to 不对    这两个都是迷惑项

so as to也不对，已经不用了

171. In 1527 King Henry VIII sought to have his marriage to Queen Catherine annulled so as to marry Anne Boleyn.

(A) so as to marry

(B) and so could be married to

(C) to be married to

(D) so that he could marry（D）

(E) in order that he would marry

这道题。B和C错在哪里啊？

so...that 比so as to好，看到so as to就可以排除了。