xdf小兰 p13.4

mirandatsui

The utility company has announced that it will permanently close its Unit I nuclear power plant, the first plant that had been built by private industry and the model for a generation of modem nuclear reactors.
a, that had been built by private industry and
b. built by private industry and
为什么此处应选择A，（xdf说过有过去完成时必定出现过去时我就毫不犹豫的选了b）

多谢解答

花公子

的确是选B啊，但是我选了built by private industry and which was
能有更详细的解答么？the model for……这个部分是起什么作用啊

0815030128

选B，LZ记错答案了吧

grubesure

我也觉得应该选B。
the first plant和the model作同位修饰 power plant啊。