The bridge outside the school annoys the students awfullyActually we don’t know

问题补充：

--- The bridge outside the school annoys the students awfully.

--- Actually, we don’t know when it will be completed.

A. to be built

B. to build

C. being built

D. having been built

答案：

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。