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Thereserchissodesignedthatonce___nothingcanbedonetochangeit.A.beginsB.havingbegunC.beginningD.begun为什么选D?
题目内容:
The reserch is so designed that once ___ nothing can be done to change it.
A.begins B.having begun C.beginning D.begun
为什么选D?优质解答
research 被动begin:that once (省略了the research is) begun nothing can be done to change it.
A.begins B.having begun C.beginning D.begun
为什么选D?
优质解答
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