[W90] The project ______ at the end of 2007 will expand the

[W90] The project ______ at the end of 2007 will expand the city's telephone network to cover
2000,000 users.
A.being accomplished
B to be accomplished
C.accomplished
D having been accomplished
帮忙翻译包括选项,并分析.

这项于2007年末完成的工程,将帮助这个城市提升它的网络覆盖率.
2007年完成,说明已经完成,所以用被动形式表达过去时.