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completed, this railway will join many industrial cities to seaport. A. Until B.

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completed, this railway will join many industrial cities to seaport. A. Until B.

 completed,this railway will join many industrial cities to seaport.

 A. Until    B. WhileC. When D. After

 

试题答案

答案:C

解析:

when表示“在……时刻”。