The farm they spent as much time as they could ________ a new look．A.on has taken onB.has taken onC.which has taken onD.on taken
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A解析本题主要考查句子的结构。farm后面接的是定语从句，把句子还原可知：They spent as much time as they could on the farm．同时句子中又缺少谓语。take on意为“呈现”。所以应选A项。