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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1945

Though I have often heard this song ______, I have never heard you ______ it.

A.being sung; sang B.sang; singing
C.sung; sing D.to be sung; to sing
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ThoughIhaveoftenheardthissong,