句子没有错答案是 A.is not decided When and where to build the new power station整个词组是名词短语作主语这是省略句,完整的句子是The question of when and where to build the new power station ......那为什么句子后面有"yet"呢，不是只有完成时才能后面跟上"yet"吗呃……这个能不能回答？拜托。。回答一下。。。算了。yet 和前面的 not 要一起看not yet =未，还未is not decided yet=in not yet decided=还未被决定