by the animal overcompensating中的by是介词，身后只能添加名词短语（注意区分这种情况和独立主格的情况）。因此，overcompensating必须为动名词短语（未划线部分的growing也是同理）。如果想给动名词短语添加逻辑主语，只能用所有格的形式，即：
animal‘s overcompensating。
D: In this choice, “now drawing” acts as a comma + verb-ing modifier. The focus on the main information here has shifted from “are now developing” in the original sentence to “have amassed”. This choice reverses original order by making the main action additional information and the additional information into the main action. This is a clear shift in the intended meaning.
①have survived a close brush with extinction 差点儿灭绝 have undergone a close brush with death差点儿死了
②说某个东西的数目its numbers的时候只能用greater来形容，不能用more than
③E选项中的with numbers很ambiguous，with谁的number？？
我觉得不能用economy来排除啊，之前有做过一道题 A mixture of poems and short fiction, Jean Toomer's Cane has been called one of the three best novels ever written by a Black American—the others being Richard Wright's Native Son and Ralph Ellison's Invisible Man. 里面就是用的a Black American
E为什么不对呢？
定位在“The large volume of transactions associated with these activities seems to have necessitated hierarchical management structures well before the advent of modern communications and transportation”
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主语没有看清！