what do they和what are they分别怎么用?接什么

what do they do? what do they do 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 They shall do what they what they do?和what do they do?有什么不同?请举例说明,谢谢 what do they do?(工程师) What will they do和What they will do有什么区别吗? 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