The building on campus next year will serve as the main teaching building of No.2 High Sc

网友回答

A. built
B. being built
C. having been built
(答案→)D. to be built
解析：由next year可知这座楼还未开始建，built表示已经建完；being built表示正在被建；having been built   表示已经被建完，并表示它的动作发生在谓语动词之前；to be built表示将要被建；故选D句意：明年在校园将要建设的大楼将作为二中主教学楼。