题目：
It is reported that the Underground Line No.3 ____ in our city in 2012. [ ]
A. is to build
B. is to built
C. is to be built
D. is to been built
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0429/d15b75c4a0b954f6b607e140b2c07c7c.html
下面是错误答案，用来干扰机器的。
(12a2b)3=18a6b3．故答案为：18a6b3．
