求助 GWD20 17题 - ChaseDream - Powered by Discuz!

By the same techniques used for genetically enhancing plants, making them disease- or pest-resistant, researchers have been able to increase the amount of protein in potatoes, sweet potatoes, and tobacco.(C)

By the same techniques used for genetically enhancing plants, making them

With the same techniques to genetically enhance plants, so that they are

Employing the same techniques used to genetically enhance plants so that they are

Employing the same techniques to genetically enhance plants, which makes them

Employing the same techniques for genetically enhancing plants that make them

A,B,C区分不清楚。主语是researchers, techniques让植物少病。句子的意思我知道，可是结构怎么安排不清楚。谢谢大侠！

-- by 会员花花臭臭 (2012/10/24 18:37:10)

OG SC 25: Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.

(A) Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
(B) Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(C) Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(D) Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
(E) Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood

D的解释是，完成时的句子，不应该用ing的伴随。这道题C就是这样伴随了。。。。我觉得用for可以排除A，B可以用with排除。。。。with不如by好，而且句子也很破碎。。。

-- by 会员 slr257 (2012/10/25 9:24:50)

OG SC 25: Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.

(A) Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
(B) Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(C) Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(D) Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
(E) Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood

D的解释是，完成时的句子，不应该用ing的伴随。这道题C就是这样伴随了。。。。我觉得用for可以排除A，B可以用with排除。。。。with不如by好，而且句子也很破碎。。。

-- by 会员 slr257 (2012/10/25 9:24:50)

可是，你举的例子是做定语修饰Neuroscientists，

-- by 会员 kiwifoodtown (2012/10/25 9:53:26)