When the new railway will run for 250 miles. A. to completeB. completedC. being complet

问题补充：

When , the new railway will run for 250 miles.

A. to complete

B. completed

C. being completed

D. to be completed

答案：

A. to complete

(答案→)B. completed

C. being completed

D. to be completed

解析：考查非谓语动词。句中的逻辑主语the new railway与complete之间为被动关系，故用过去分词作状语。句意：当新铁路完成的时候，铁路的运行长度将达250里。故B正确。