Nearly two weeks passed______the old man was able to explain what had happened to hinA.whe

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Nearly two weeks passed______the old man was able to explain what had happened to hin

A.when

B.till

C.before

D.while

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_________。