求大神来帮忙分析一下这题的正确选项

forestlong · 发表于 2017-10-7 16:30:54

Studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this that an epidemic of malaria struck in the empire's wanning day.
A. Studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this
B. In studying skeletons unearthed near Rome, DNA evidence was recovered by scientists, who were able to deduce from this
C. Scientists recovered DNA evidence from studying skeletons unearthed near Rome, being able to deduce from this
D. Skeletons unearthed near Rome allowed scientists to recover DNA evidence, and they were able to deduce from it
E. Scientists studying skeletons unearthed near Rome recovered DNA evidence from which they were able to deduce.
这题的正确选项是E, 但是我不是很清楚正确选项中recovered DNA evidence from which是什么样的一个结构，不是应该which前面都会有comma吗？而且好像from which也没听说这个说法，有没有大神可以帮忙解答一下，谢谢

柚子君不失学 · 发表于 2017-11-3 00:59:20

recover evidence 就是發現了xx证据，from which是定语从句的引导词，定从修饰evidence。
Scientists studying skeletons unearthed near Rome recovered DNA evidence （from which they were able to deduce xxx.）
其实from可以放到整个定语从句后面来看,写完整就是：they were able to deduce xxx from the evidence.

xsq805 · 发表于 2017-11-3 17:23:21

prep + which 是有这样的用法的，比如，题中的from which, in which, of which, 等等
这样的用法可能有，也可能没有逗号，其区别是“限定性修饰”和“非限定性修饰”的差别。就是说，如果修饰的内容是必要信息就没有逗号，而如果只是额外的说明就有逗号。

求大神来帮忙分析一下这题的正确选项

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