Once ______ this power station will supply all the neighboring towns and villages with e

外语类 公共英语 已帮助 人

Once ______ , this power station will supply all the neighboring towns and villages with electricity.

A.it being completed

B.it completed

C.completed

D.it completes

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_________。