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题库 / Prep2007E2-SC-147
Australian embryologists have found evidence that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving as a kind of snorkel.
that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolving
that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
suggesting that the elephant had descended from an aquatic animal with its trunk originally evolved
to suggest that the elephant had descended from an aquatic animal and its trunk originally evolved
to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved
题目分析：
略。
选项分析：
A选项：and是连词，应该连接两个句子。本选项and身后缺少谓语动词。
另外，本选项整个划线部分是evidence的定语从句，这个定语从句应该改为不定式短语。这点考查了“不定式和从句的区别”。用之于本题，主句“澳大利亚胚胎学家发现证据”这件事会直接影响“证据能表明大象的进化史”这件事的发生与否（如果不发现证据，证据自然什么都无法证明）。
B选项：定语从句错误同(A)。
C选项：本选项也是evidence的定语，是一个现在分词短语。这点考查了“不定式和ing的区别”。同理于选项(A)，本题中evidence的定语必须是不定式形式。另外，had descended是过去完成时，表示某一个在过去的过去发生的事件。由于证据表明的是“客观真理”，不是某一个事件，所以应该过一般现在时而非过去完成时。
D选项：“大象来自于水生动物”是一个客观存在的事实，所以应该用一般现在时而不是过去完成时。（该错误同选项(C)）
E选项：Correct. 本选项在语法和逻辑上均是正确的。
RON对B选项的解释：（btw老师的解释很难在做题的时候就能判断这里一定要用to suggest其实）
1. 时态错误，不能说这个evidence从过去某一个时间点一直suggest到现在吧，这里表数一个事实更合理
2. descend 遗传 这个单词要注意主动被动有很大区别，这里要用被动语态更合理（大象被 aquatic animal遗传），如果用主动语态会变成大象遗传给 aquatic animal
3. 本题用that suggest that和to suggest that都没有问题，就是前面的写法比较丑而已
two other elements of that answer choice are problematic:
* "has suggested" --> this is the present perfect, which is used to look back on past events that have some sort of relation to the present situation. so, "has suggested" would signify that, at some point in the (probably recent) past, this evidence has suggested what is stated here -- but that it doesn't suggest those notions anymore.
* "descended" (without "is") --> if you mean to state an evolutionary relationship, you should use "is descended". "descended", used alone, signifies literal downward motion.
解释很清晰，我也认为老师在这里对v + to do这样的解释根本站不住脚，在别的题他就会说，found是约束力弱的动词，后面不可以接to do。。。
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