摘要： We were told that we should follow the main road we reached the central railway station. A.whenever B.until C.while D.wherever 答案 B 解析 until用于肯定句中.与延续性.持续性动词连用.意为“直到--为止 ,用于否定句中.与瞬间性.短暂性动词连用.意为“直到--才.不到--不-- .

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