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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 2099

--- What do you think of the grammar book?
--- Oh, it really is ________ useful reference book, which is worth reading ________ second time.

A.a; a B.an; the C.an; D.the; the
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Whatdoyouthinkofthegrammarbook