At present a special village for the athletes from different countries to live in.A. is b

问题补充：

At present a special village for the athletes from different countries to live in.

A. is built

B. is being built

C. builds

D. is building

答案：

A. is built

(答案→)B. is being built

C. builds

D. is building

解析：从时间状语At present看，与现在有关，village与build之间构成被动关系，排除ＣＤ，而且build动作正在进行，故选择Ｂ。句意，目前一个给来自不同国家的运动员居住的特别的村子正在被建。