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Those were the graduate assistants ______ to do the research

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Those were the graduate assistants ______ to do the research work in the lab.
A.to whom it was their responsibility B.whose responsibility there was C.whose responsibility was D.of whom with the responsibility
答案C 此题考查属格关系代词引导的定语从句,[A]、D.项应先排除;B.项从句的谓语为there be结构,讲不通;因此只有[C]项为正确答案.查看原帖