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:其他 难易度:中档

    Having a glass of water first in the morning helps rid our body of poisonous substances that ________ overnight.
    A. was stored             B. is being stored      C. have been stored   D. had been stored 
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