What will the world be like in the future? I think a lot of what we see in science fiction films (科幻电影)____(come) true.

    There ____ (be) flying cars parking (停) on top of buildings. If this happens, there won't be any busy streets! I ____ (think) that most houses will be green, because we ____ (use) green energy (能源) like wind. In the future, I think robots____ (do) most housework, so life will be easier.There ____（be） robot teachers, too. Children____ (take) small computers to school, not books. No one really____(know) what our future will be like. All we need to do ____ (be) to believe in ourselves. As Albert Einstein once ____ (say), "I never think of the future. It comes soon enough. "