og sc 25 求关于modifier的问题

Bonnie_xi

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.


原题如上 想问下nn们关于 over the past twenty years  放前放后的问题 我原本觉得应该 konwledge 后面应该紧跟 about XX 再加 over时间状语 看来理解错误 想知道为什么要先按 A 的顺序

Bonnie_xi

= = 好吧 我懂了 over xx 放后面可能会引起修饰 adulthood 的歧义