Question

Now many people move into cities in order to have their chil

Answer 1

选3,better educated

have sb.do sth 让某人去做某事

have sb.done sth 表示被动的

have sb.doing sth 表示容忍某人做某事,或者让某人一直做这件事情,有关时间

have sb.do sth 表示这件事情还没有发生,即将去做,但是还没有做