一、 D C A B二、 No one has discovered any life we have already sent them but she has never been I saw him showing the foreignvisitors around 三、阅 In It sent the first space station A space Until the late The history of space stations and whatthe life in space stations is 四、 C B A D B C A C B A 五、Scientists think that therehas been life on earth for hundreds of millions of Seven other planetsgo around the sun like the However, none of them has an environment likethat of the So scientists do not think they will find life on The sun and its planets are called the And our solar system is a small part of a much larger group of starsand We call it G Scientists have also discovered many othergalaxies in the So it is impossible to imagine how large the We have always asked the question:With so many stars in the universe, are we alone? Is there life out there inthe space? We’re looking forward to knowthe
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