What ------- do they come from 横线填什么?现在就要,急

what do they do? what do they do they They shall do what they what do they What do they what do they What do they need? what animals do they they/have/what/do/(?) what do they what do they do?(工程师) what()they()they()there?what()they()they()there?[do] What do they doing?是What do they like doing？ What can't they do　还　 what they cant do? What ___ do they like? What are they( )(do)now what will they do firt What do they like doing?