51. <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 (O) (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 ofknowledge about the brain and its development from birth to adulthood, 对这题能快速删除BC选项, 但我存在着对D选项的疑问 根据OG解释与曼哈顿Ron都说完成式不应该跟随着有强调时间<NOW>做分词构句修饰, 所以这边我有两个问题: 1. 完成式的句子逗号後可以有分词构句的伴随修饰吗?<不强调时间的话> 2. D选项如果把now去掉有没有比A选项更加清楚表达出结果伴随? 即 adulthood, drawing solid....这样D选项会是正确的吗? 先谢谢大大解答!!感恩! --

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