七年级上Unit 5单元测试题 时间: 90分钟 满分:90分 I.阅读理解（共20小题, 每小题2分, 满分40分） 第一节 阅读短文, 然后根据其内容从A 、B、C、D中选出最佳选项 （A） Introduction Rockets are like big engines that help push (推) things in a forward (向前) or upward direction. We use them to launch spaceships into space or to shoot fireworks into the sky. How Rockets Work Rockets work by burning fuel (燃烧燃料). When the fuel burns, it produces a very hot gas. This gas shoots (射出) out of the back of the rocket and pushes it forward. History The Chinese were the first to make rockets, back in the 1200s. They filled bamboos with a special kind of powder (火药). This powder burnt very quickly and produced enough gas to shoot the rocket into the air. Later, in the 1700s, people started making rockets out of metal (金属). In the late 1800s, a Russian scientist, Konstantin Tsiolkovsky, was the first person to design a liquid (液体的) fuel rocket, but he didn’t build one. An American engineer named Robert Goddard was the first person to do this in 1925. In 1957, the Soviet Union (苏联) used a rocket to launch the world’s first space satellite, Sputnik. Since then, many countries have used rockets to send things into space. 1. What happens when the fuel in a rocket burns A. It creates a cool gas and the gas pushes the rocket upward. B. It creates a cold gas and the gas pushes the rocket forward. C. It creates a cool or hot gas and the gas pushes the rocket upward. D. It creates a hot gas and the gas pushes the rocket forward. 2. When did the Chinese first make rockets A. In the 1200s. B. In the 1700s. C. In the 1800s. D. In the 1900s. 3. What did the Russian scientist Tsiolkovsky do in the late 1800s A. He built the first rocket. B. He wrote down ideas about space travel. C. He launched the first space satellite. D. He designed the first liquid fuel rocket. 4. What is the main purpose of the text A. To explain how rockets help people. B. To describe the history of rockets and how they work. C. To provide information about different types of rockets. D. To discuss the history and influence of space exploration. （B） Mars (火星) is the fourth planet from the Sun and the second smallest planet in the Solar System. Is there life on Mars Nobody knows. We are sure that people cannot live on Mars so far. We need oxygen to live. But there is almost no oxygen on Mars. Living on Mars is like living on a very high mountain. There is little air. It can be as hot as about 50℃ above zero at noon and as cold as about 100℃ below zero at night. Plants and animals can grow on the Earth because it has a lot of carbon (碳). Like the Earth, Mars has this kind of material as well. So many people think there may be plants on Mars. And it has four different seasons. Of all the planets in the Solar System, the seasons of Mars are the most Earth-like. Through a telescope, we see that Mars looks red. In some places, it seems grey. Sometimes, grey colour turns grey-green, then brown, t ... ...
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