改錯：Oneday,Iwascookinginthekitchenasthetelephonerang.
問題詳情：
改錯：One day, I was cooking in the kitchen as the telephone rang.
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【回答】
as→when be doing ... “正在做某事這時……”，是固定用法。
知識點：完成句子
題型：短文改錯
