答案：解析：

参考

I think our world will be more beautiful

in the future. There will be more trees and modern machines like robots around

us. I want to have a robot because I think it can help us do many things. For

example, it can do much housework so that our parents won’t be so busy. They

will have more time to stay with us. But if we don’t study hard, these things

won’t happen at all. So we must work hard for a bright future.