So far this year many new houses in Wenchuan with the help of the government.A. buildB.

问题补充：

So far this year, many new houses in Wenchuan with the help of the government.

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：考查动词的时态。句中有So far“到目前为止”，使用现在完成时态，故选D。