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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。
"evidence to suggest" and "evidence that suggests" are both acceptable in this sort of context. neither is a basis for elimination. normally you would see "evidence that suggests..." however, they've used "evidence to suggest..." here, in order to avoid writing evidence THAT suggests THAT xxxxx. not because it's wrong -- just because it's ugly.
B：descend from意思是下降；be descended from才是“...是...的祖先”
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