Theundergroundsystem 国语站 题库 2.8W 大中小设置文字大小 问题详情: The underground system ________ in the city now will be opened next year.A. constructing B. to be constructed C. is constructing D. being constructed【回答】D知识点:非谓语动词题型:选择题 TAG标签:Theundergroundsystem #