____ the repair in so short a time is unknown to us.A.How they finishedB.How did they fi

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____ , the repair in so short a time is unknown to us.

A.How they finished

B.How did they finished

C.That how they finished

D.That how did they finished

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。