急!求助They can do a lot of work for people.划线部分提问

问题描述:

急!求助They can do a lot of work for people.划线部分提问
划线a lot of work

What can they do for people?
步骤:
1,对事提问用what,2.把原句变成一般疑问句;
3、去掉划线部分