新PREP1-188 求助，明天要考了。希望各位帮帮忙！

lxc2000

188.(26379-!-item-!-188;#058&001961)



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,
我不明白A中的插入语，不是说主谓之间加入插入语会导致夹心修饰的歧义吗？为什么这里没问题呢？

lxc2000

有人来解释一下吗？

红尘道士

188.(26379-!-item-!-188;#058&001961)



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,
我不明白A中的插入语，不是说主谓之间加入插入语会导致夹心修饰的歧义吗？为什么这里没问题呢？

-- by 会员 lxc2000 (2010/6/23 1:36:35)

哪里来的夹心修饰的说法，那么多的同位语，插入语，不都是这样的么

程喷喷

这里没有夹心修饰的错误~~~~判断夹心修饰错误,你要看看歧义在哪里的~~~一般with开头的夹在中间的比较高发~~~~
这题的问题在那个over the past twenty years~~~~~~~~~
        A．正确
    B．over the past twenty years修饰development不符合逻辑；and are造成句子不完整
    C．over the past twenty years修饰development不符合逻辑；and are没有主语，导致comma splice （run-on sentence?? Sentence fragment??）
    D. 改变句子重心，改变逻辑意思
    E．改变句子重心，改变逻辑意思