og 21 D选项，求指导！

laughaholiker

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,

laughaholiker

OG 答案上说 drawing修饰adulthood，不是应该是修饰主语么？

tofreesky

这是prep08上给的解释

现在分词在句尾用逗号隔开，必须要注意的一点是这个结构从来都没有失去过“做定语”的功能，只是优先做状语而已，即优先修饰到前面主句的主语和谓语。如下题如果前面主句的谓语是完成时态，那么既然已经完成了，drawing就无法再做其的伴随，所以只剩下做定语的功能。

f2050711489

wtf这题难倒补选a吗?!