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[Sentence Correction]
试题详情
题目：
Gas hydrates, chemical compounds of water and natural gas, are increasingly being studied for their potential to be huge reservoirs of energy, possibly causing sea floor instability, and significant contributors to global warming.
选项:
A、to be huge reservoirs of energy, possibly causing sea floor instability, and
B、to be huge reservoirs of energy, possibly causing sea floor instability, and even as
C、as huge reservoirs of energy, possibly causing sea floor instability, and
D、as huge reservoirs of energy, and the possible cause of sea floor instability,
E、as huge reservoirs of energy, as possible causes of sea floor instability, and even as
答案:
A
提问：
如果要用and even as那么and之前就需要有个as连接的东西与之对应。所以排除B,E；possible cause of sea floor instability是修饰huge reservoirs of energy并不是并列关系，所以排除D,怎么区别AC的小词一个as，一个to be呢？
解答：
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