职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:英语知识运用 题类:历年真题 难易度:易

    Just__________underwater grass floats on the surface if it loses its roots, a nation is lost without its memories.(  )
    A. since B. while C. as D. when
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