问题补充：
--- So far this year,many new houses in this area with the help of the government. --- It’s great.
A. build
B. are built
C. will build
D. have been built
答案：
A. build
B. are built
C. will build
(答案→)D. have been built
解析：本题考查的是现在完成时的被动语态其结构为主语+have been+过去分词，故选D
