有点矛盾的一个点，求解答

CD用户1380210

有一个知识点是  to是用来修饰主语的，
这个知识点记得比较牢因为有一道题做错了

Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.

D apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of
E apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from
选E不选D是因为D用了to，Hydrocarbons是不能去taste一个东西的



但是在这道题里
Nineteenth-century doctors thought that alcohol, when ingested, passed through the stomach into the bloodstream and was broken down only by the liver; recent studies, however, have led them to conclude that the stomach breaks down up to 20 percent of ingested alcohol before it reaches the liver.

C have led doctors to conclude
E lead to the doctors` conclusion

答案是C
因为to是修饰主语的，所以这里的to conclude是去修饰recent studies，
但是recent studies能去conclude一个结论吗，不应该是doctors去conclude一个结论吗？
所以我就选了个比较丑的E

求解答
感觉有一些矛盾，不知道怎么说服自己

CD用户1380210

因为主语能不能发出to这个动作错了好几次，有点神经质，看到to就要去对应能不能被主语发出，结果就错了
下个礼拜考试，不搞懂这个点有点慌张啊

leonlo

你其实是没有理解句子的意思当然for doing 和to do优选  to do