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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1707

—You may find the key to the math problem on page 107.
—Ah, it's so simple. I wonder why I _       of that.

A.hadn't thought B.haven't thought
C.didn't think D.wasn't thinking
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—Youmayfindthekeytothemathprob