once ----,this power station will supply all the neighboring

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once ----,this power station will supply all the neighboring towns and villages with electricity.
A.it being completed B,it completed C.it was completed D.it completing
为什么选B而不选A呢?

eing completed指某事物正在被完成.
completed是已经完成.
句子的意思是说只有完成了某样东西,发电站才能供应电能.

Once ____,this power station will supply all the neighboring once ----,this power station will supply all the neighboring Once _______, this power station will supply all the neighbo All the efforts will lead to_________stronger and more power This is the picture of the new power station ________ in my 1 This is a photo of the power station that _____ in my home 英语翻译This is the largest power station that we have ever visi .the new power station is reported__within this year.A to ha 英语翻译(1) This is a photo of the power station that（）in my ho This is a photo of the power station that ________in my home 1.This is a photo of the power station that ________in my ho girl power all the