【课时同步】2018-2019学年外研版高中英语必修3课件:Module 6 Period 3 Grammar 语法专题课 探究导学课型
【课时同步】2018-2019学年外研版高中英语必修3课件:Module 6 Period 3 Grammar 语法专题课 探究导学课型第4页

②The Three Gorges Dam, ______ is the biggest construction project in China since the building of the Great Wall and the Grand Canal, has been built to control flooding and provide hydro-electric power for the central region of China.

which