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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1131

The professor, ________ his assistants,  _______ conducting the experiment.

A.in addition, is B.as well, is
C.in addition to, are D.as well as, is
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Theprofessor,hisassistants,con