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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 220

A wonderful idea suddenly occurred to me ______ I would turn to the reference book to finish my homework.

A.that B.if
C.when D.which
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Awonderfulideasuddenlyoccurred