On the one hand, Earth Awas lifeless for its first two Bbillion years; Cotherwise, it was a seething mass of volcanic Dand geolo

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问题 On the one hand, Earth Awas lifeless for its first two Bbillion years; Cotherwise, it was a seething mass of volcanic Dand geologic activity.

选项 A、 
B、 
C、 
D、 

答案C

解析 Otherwise is incorrect in the paired expression on the one hand...on the other hand. Correction: on the other hand.
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