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2.It exploded loudly with fire and rock.They were( 60)in (61)time to produce carbon dioxide,nitrogen,water vapour and other gases,which were to make the earth's atmosphere.

分析 它巨大的爆炸喷出了烈火与岩石,最终产生了二氧化碳、氮、水蒸气和其它多种气体.从而形成了地球的大气层.

解答 答案是in,time.
本题考查语境中选用适当词或短语;in time及时;迟早; 最后;根据语境,题干中说明地球的巨变"最终"产生二氧化碳、氮、水蒸气等组成大气的气体,故答案是in time.

点评 单词填空必须在对语境整体理解的基础上抓住指向答案的关键线索、固定句型或搭配等,同时注意所选词的形式变化.

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