.My brother wants to work in the factory which still .A. is/ buildingB. has /been builtC.

问题补充：

.My brother wants to work in the factory which still .

A. is/ building

B. has /been built

C. is /being built

D. is /to be built

答案：

A. is/ building

B. has /been built

(答案→)C. is /being built

D. is /to be built

解析：句意：我哥哥想去那个正在被建的工厂工作。因为是still“仍然”，所以是现在进行时，而且the factory和build是被动关系，用现在进行时的被动，选C。