老师：Hello, everyone. Welcome back. Do you remember what we Learned last lesson? Yes, we Learned something about the Mars. Mars is the fourth planet from the sun in our solar system. There are many planets in the universe. Look at the picture. Do you know something about the universe? Today we will learn something about it. Let's watch the flash and try to choose the proper title for the passage. Is there life out there, our planet? the stars at night。
学生：科学家们认为人类在地球上已经生存了好几百万年了，然而我们还没有在其他的星球上发现生命。地球是一个行星，它绕着太阳旋转，还有其他的七颗行星也绕着太阳转。太阳和这些星系被称为太阳系，而太阳系只是宇宙的一小部分。
老师：Scientists have launched many spaceships to explore other planets in the solar system. Some spaceships have gone beyond the solar system.
学生：科学家们已经发射了许多宇宙飞船去探索太阳系的其他星球，一些飞船到了太阳系以外的地方。 beyond 在什么较远的一边超出除什么之外？
老师：example， our success was far beyond what we thought？
学生：我们的成功远远地超出了我们的预想。虽然飞船已经可以去那么远的太空了，但是依然没有发现其他生命存在太空的痕迹。我们也感到疑惑，为什么没有其他星球上的生物给我们发送信息？他们是否也尝试过给我们发送信号？太空中有那么多星球，是否有其他生命的存在？这些疑问都有待于科学家们进一步的探索来给我们解答。
老师：You can search it online if you're interested in it. Look at the picture and match the letters in the picture with their names according to 1A.
学生：下面我给大家介绍一下太阳系的 8 大行星。太阳系八大行星分别是水星、金星、地球、火星、木星、土星、天王星和海王星。太阳系最大的行星是木星，最小的是海王星。行星由太阳往外的顺序是水星、金星、地球、火星、木星、土星、天王星、海王星。这些行星都以太阳为中心，以椭圆轨道攻转。宇宙那么大，是不是别的星球上会有和我们人类一样的生物？下面有艘宇宙飞船要去太空探险了。
老师：Let's write a short introduction about our earth and it'll be put on the spaceship. Maybe the aliens will find it. Now let's look at Jing's introduction.
学生：Our earth, do you want to know about the US? Now let me tell you something about it. The earth is the third planet from the sun in our solar system and is named after Old English. It goes around the sun. The moon is its only planet. Its diameter is 12742 km. The surface area of the earth, 510 million square kilometers and the temperature is between minus 89.2 degrees centigrade and 61 degrees centigrade. The air has 21% oxygen, so plants, all kinds of animals and human beings can live on the earth. The population of the world has reached 6.8 billion. Do you want to make. friends with us。
学生：但愿我们的介绍可以被外星人看懂。
老师：If aliens are found in the near future, what changes will happen to people on the earth? Hong Kong is talking about it with his friends. Let's have a look. Hi, Kang Kang. What are you doing? I'm reading a passage about aliens. Do you think there are aliens? If there are, what will happen to us? I think more aliens will be found with the help of our new friends. And students will be sent to their planet to learn their language. What do you think of it? I think I can make friends with them. We can come to my home for visit. Take me to their planning ha.
学生：Ha ha ha.他们两个的想法还真的有意思，有空你也可以和朋友们讨论一下。
老师：okay， we have fit。 Finished the whole topic. Let's review what we have Learned. A wo
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