people here are excited at the news that the bill___a hydropower will be built has been passed.
问题描述：
people here are excited at the news that the bill___a hydropower will be built has been passed.
A that B which C what Din which
答案是A,解释和翻译
答
这里的人们对于新建一个水力发电站的议案的通过的消息感到兴奋.
同位语从句.
that a hydropower will be built has been passed用来说明the news.