— ________ you ________ anything unusual about our car?— Not within the last three dys．A.Do;findB.Did;findC.Have;foundD.Are;finding
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C解析此题考查根据语境使用现在完成时的能力。答语是一个主句中只保留not的省略句。完整形式应为：I haven't found anything unusual about our car within the last three days．所以解决问题一定要将句子全面考虑，避免草率。