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There might be life on other planets, but so far scientists haven't found enough ________ to prove it.

A.evidence  B.relicC.mysteryD.reception

A

解析试题分析:名词词义辨析。A证据;B遗址,遗迹;C秘密,谜;D接待,欢迎;句意:在其它的星球上也许又生命,但是到目前为止科学家们还没有找到足够的证据来证明这一点。故A正确。
考点:考查名词辨析
点评:名词的词义辨析要放在上下文的语境中进行,要注意上下文的语义的串联以及逻辑关系的推理,特别要注意一些名词的固定搭配以及名词的深层次的含义的区别。

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