语法笔记188

evelyn205205

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,(A)

E.Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,

这道题我懂为什么选A。
只是有个疑惑的地方就是knowledge不是应该后面直接跟上about the brain and。。。中间不能加入over the past 20nyears么？

ran2010zx

我觉得这个时间状语放在这里没有问题啊。。。强调了是在过去的二十年中积攒了海量经验。。。

evelyn205205

不好意思，前面脑抽了