Four students are talking about the future after class. “ In 2050, our life will be much 1 than it is now. The sky is bluer and water is clearer. We can 2 the fresh air every day. Humans and animals 3 the world peacefully. ” says Zhang Tao, full of hope. Wang Yan thinks that it is not a 4 to travel to the moon for a holiday. We eat healthy food every day. At that time, everyone will enjoy a 5 life. Li Yuanyuan believes that people will have more free time because robots ( 机器人 ) will be very popular and will do many things 6 people. And we will build new 7 on other planets ( 星球 ). Maybe we can chat with each other in our new homes. Zhao Kai thinks that no animals will die out because of cloning ( 克隆 ). There will 8 no pollution ( 污染 ). The whole world will be one big 9 . As time 10 , we ’ ll live a much easier and better life. Their teacher Mr. Chen tells them to work hard for their dreams and future. “ Nothing is impossible. ” says Mr. Chen.