With the development of science and technology, our lives have changed a lot in the past century. Many things that wouldn't happen before have come into reality now. Therefore, our lives will change as well in the future. Our pace of live will greatly speed up, because we will help many machines to finish our work. Many things can be done autonomously. Therefore, people will have more time for fun. People can travel the outer space freely. Space shuttle can bring people to planets far from the earth. Human beings may live in other planets. Besides, our environment will be much better than now, because some effective measures are taken to protect the environment. Earth is still a beautiful home for human.

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