I will agree with the idea that in the future robots is very useful to us. First, home robots will be able to do our housework. Second, teaching robots will be able to help children do their homework. Next, worker robots will be able to build houses in the air; doctor robots will be able to help sick people; space robots will be able to build space stations on many other planets. Finally, robots will be able to do dangerous work for us. For these reasons, I think that robots will be useful in our future.