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哈哈哈刚刚看到了Ron大神的解答.. 分享一下~
B选项中,-ING修饰语发生时间应该为过去时,和前句中现在时矛盾:
-ING modifiers SHOULD adopt the timeframe of the clause to which they are attached. The problem here is that we need to change the timeframe: "the elephant is descended..." is stated in the present, because it's a timeless fact about evolution, but "its trunk originally evolved..." needs to be in the past because it's an isolated historical event. the -ING modifier mistakenly suggests that both of these belong to the same timeframe. |
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