◎ 题干
There are many reasons for animals _____ but the most important one is the part _____ humans have played.
[     ]
A. die out, that
B. dying out, that
C. died away, which
D. dying down, which
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“There are many reasons for animals _____ but the most important one is the part _____ humans have played. [ ]A. die out, that B. dying out, that C. died away…”主要考查了你对  【关系代词】【动词短语】【现在分词】【限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。