Several days passed before those well-known experts______(想出解决问题的办法).came up wit

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问题 Several days passed before those well-known experts______(想出解决问题的办法).

选项

答案 came up with solutions

解析 come up with意为“得出……，想出……”，solution“解决办法”。因为主句的时态是过去时，根据时态一致的原则，从句的时态也应为过去时。

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[originaltext]W:Idon’tbelievewe’veevermetbefore,havewe?M:We’vebeen