问题描述:
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 completing
为什么选C而不选B呢?
A.it being completed B,it completed C.completed D.it completing
为什么选C而不选B呢?
问题解答:
我来补答展开全文阅读