There are milions of people （who have gone to the cities to work）.括号内改简单句可你们意见不统一，

There are milions of people （who have gone to the cities to work）.括号内改简单句可你们意见不统一，
There are milions of people （who have gone to the cities to work）.括号内改简单句
可你们意见不统一，

There are milions of people （who have gone to the cities to work）.括号内改简单句可你们意见不统一，
There are milions of people having gone to the cities to work

There are milions of people going to the cities to work

going to cities to work

There are milions of people having gone to the cities to work