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  • 更新 2022-09-03
  • 科目 英语
  • 题型 选择题
  • 难度 中等
  • 浏览 255

____ on ten years of observation and study, the story shows that everyone dreams every night, whether they realize it or not.

A.Basing B.Based
C.Being based D.Having based
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ontenyearsofobservationandstud