300-word composition in the fourth grade of primary school: I set up a base on Mars.

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This article applies to: the fourth grade of primary school.

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This composition is about 300 words in the fourth grade of primary school. The title is: "I built a base on Mars". Everyone is welcome to contribute enthusiastically. Author: Zhu Mars is the closest and most similar planet in the solar system. It is the little "brother" of the earth. Therefore, it is the first choice for earthlings to immigrate to other planets.

One day twenty years later, three assistants and I flew the space shuttle to Mars. According to the detection, there is water at the poles of Mars, so we decided to land at the North Pole of Mars.

A few days later, our space shuttle landed at the North Pole of Mars. We found that there is a lot of ice underground here. It's noon on Mars. My assistants and I soon got ice cubes to make water. From this moment on, our work of building the base officially began.

Ten days later, our biosphere was built. Then, we first cloned some plant cells brought from the earth into grass, vegetables, flowers and trees. Animals such as puppies, dairy sheep and donkeys were cloned. Then, birds and bees were cloned one by one. Then there was a river in the biosphere, and cloned fish swam happily in the water.

A year later, our biosphere seems to be a "paradise" on earth. Our Mars base has finally been built.

Author: Zhu