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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1482

When my cat is hungry, he _______ the cage door _______ his paw.

A.knocks on, in B.knocks at, with
C.knocks on, by D.knocks at, uses
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Whenmycatishungry,hethecagedoo