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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:991

—How often do I need to feed the dog?
—It ________ food every day, or it will be hungry.

A.must give B.must be give
C.must be given D.must be gave
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—HowoftendoIneedtofeedthedog?—