Oxford Reading Tree: Level 16: TreeTops Non-Fiction: Let's Go To The Planets

Could there be life on Mars and other planets? 火星和其他行星上有生命吗? People looking up at the skies have always had a yearning to know more about what's in space. 仰望天空的人们总是渴望更多地了解太空。 However, it is only since the technological age of the twentieth century that space exploration has really been able to take off. 然而，只有在二十世纪的技术时代，太空探索才真正能够起飞。 Read about some of the missions to the planets 阅读一些关于行星的任务