The Town Hall ______ in the 1800's was the most distinguished building at that time.
A.to be completedB.having been completedC.completedD.being completed在线课程C
解析：
思路
分析：The Town Hall与completed是被动关系，故用过去分词作定语修饰The Town Hall。having been completed表示动词已开始到现在仍在进行，与句意不符；
to be completed表将来完成；
being completed表正在进行，都与句意不符。【点评】考查非谓语动词的时态，难度较大。