Mars (火星) is a planet (行星). It is the fourth planet from the sun and is more than 200,000,000 kilometers from it. That is a very long way. Mars is also a very long way away from Earth but sometimes you can see it clearly at night. Most stars are white. But Mars is a little red. It is a very big planet. It is about half the size of Earth. The planet Earth has one moon. Mars has two moons. They are called Phobos and Deimos.
Long ago, the only way to study Mars was just to look at it. People with good eyes could see some things but not everything. Later on, it was easier, because scientists had telescopes (望远镜). They could see Mars come clearly. They learnt much more about Mars this way. In the twentieth century (世纪) things got even better. First of all, we had spacecraft. They flew close to Mars and sent back information. Then, they sent spacecraft to fly around Mars. Finally, spacecraft landed (着陆) on Mars.
Maybe one day a man will walk on Mars.
根据短文内容完成以下任务。【小题1】回答问题：How far is Mars from the sun?
【小题2】回答问题：What color is Mars?
【小题3】完成句子：
【小题4】完成句子：The article mainly talks about
【小题5】请选出划线单词spacecraft 的汉语意思。________（填字母代号）
| A．宇宙飞船 | B．望远镜 | C．潜艇 |
