For three quarters of its span on Earth, life______almost exclusively as microor

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问题 For three quarters of its span on Earth, life______almost exclusively as microorganisms.

选项 A、revolted
B、involved
C、resolved
D、evolved

答案 D

解析此题测试形近词的辨析。revolt“反抗，起义”；involve“卷人，陷入，连累，包含”；resolve“解决，下决心，分解’’；evolve“(使)进化，发展”。按题句意“生命在地球上四分之三的时间几乎全部是(只是)作为微生物发展的，”应选evolve。

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