--- The bridge outside the school annoys the students awfully.
--- Actually, we don’t know when it will be pleted.
A. to be built
B. to build
C. being built
D. having been built
网友回答
A. to be built
B. to build
(答案→)C. being built
D. having been built
解析：本题考查非谓语动词。句中being built作定语，修饰名词the bridge，表示“正在被建筑的大桥”。故选C。