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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 它巨大的爆炸噴出了烈火與巖石,最終產生了二氧化碳、氮、水蒸氣和其它多種氣體.從而形成了地球的大氣層.

解答 答案是in,time.
本題考查語境中選用適當詞或短語;in time及時;遲早; 最后;根據語境,題干中說明地球的巨變"最終"產生二氧化碳、氮、水蒸氣等組成大氣的氣體,故答案是in time.

點評 單詞填空必須在對語境整體理解的基礎上抓住指向答案的關鍵線索、固定句型或搭配等,同時注意所選詞的形式變化.

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