Why did people build this?

Why did people build this? did,build,people,why,this 连词成句 是不是 ：Why did people build thi Why did the people Why did China decide to build three gorges dam Why do people build ice fishing huoses翻译 Why did people choose the name Greenland Why did he cut himself this morning? Why did you choose this institution Why English is everywhere?Why did this happen? people ,ago ,did ,the ,build ,time ,long ,a ,bridge ） 连词组句 A:How did the Chinese people do the work to build the wall?B 把下列句子改写成被动语态:when did the people build the bridge?