It would be great to have robots______(do)all the work for us

It would be great to have robots____do__(do)all the work for us
你是怎么处理变质牛奶的? ＿＿Howdo ＿you＿ deal with ＿＿the bad milk?
奶奶已经学会如何网上冲浪了. Granny has learnt＿how to surf＿＿＿＿＿＿on the Internet.
他们正在讨论是否去海南旅游. They're discussing＿＿whether to go to ＿＿＿Hainan.第一条不应该填to do吗 表目的啊？这里是have sb do sth ,让某人做某事，是不带to 的动词不定式。