三、阅读理解
Our solar system was formed about 4.5 billion years ago! But what exactly is the solar system? It is made up of our sun and eight main planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. There are also moons, dwarf planets, asteroids, comets, rocks and dust.
Planets
All of the planets in the solar system travel around the sun. Mercury, Venus, Earth and Mars are called “terrestrial planets（类地行星）”. They are mostly made of rock and metal. Jupiter, Saturn, Uranus and Neptune are called “gas giants（气体巨星）”. They are mostly made of gas and they have rings. The smallest planet is Mercury and the biggest is Jupiter. Neptune is the coldest planet and Venus is the hottest.
Moons
Moons travel around planets. Earth has got just one moon, but there are at least 150 moons in our solar system. Jupiter and Saturn are the planets with over 350 confirmed moons! Mercury and Venus have no moons at all.
Stars
Stars are huge balls of very hot gas. Our closest star is the sun, and it's 150 million kms away from the planet Earth! Without the sun's energy, there would be no life on Earth.
()1. How does the writer show the topic of the passage in the first paragraph?
A. By giving numbers.
B. By telling a story.
C. By using a saying.
D. By asking a question.
()2. What is Mars mostly made of?
A. Rock and metal.
B. Metal and gas.
C. Rock and gas.
D. Rock and dust.
()3. is the biggest gas giant.
A. Neptune
B. Jupiter
C. Mercury
D. Venus
()4. The underlined word “confirmed” means “” in Chinese.
A. 已被利用的
B. 已被废弃的
C. 已被证实的
D. 已被发明的
()5. What can we learn from the passage?
A. All the planets have moons.
B. The sun has got just one moon.
C. Jupiter and Saturn have over 350 moons in all.
D. There are less than 150 moons in the solar system.

1.D 2.A 3.B 4.C 5.C

【分析】
1. 第1题：先阅读第一段，发现作者先介绍太阳系形成时间，随后用问句“But what exactly is the solar system?”引出话题，判断是通过提问的方式展示主题，对应选项D。
2. 第2题：定位原文中类地行星的描述，明确火星属于类地行星，类地行星主要由岩石和金属构成，对应选项A。
3. 第3题：查找原文中行星大小的描述，可知最大的行星是木星，而木星属于气体巨星，因此最大的气体巨星是木星，对应选项B。
4. 第4题：结合语境分析，原文提到木星和土星有超过350个“confirmed”卫星，此处“confirmed”意为已被证实的，对应选项C。
5. 第5题：逐一核对选项与原文：A选项水星、金星无卫星，错误；B选项地球有1个卫星，不是太阳，错误；C选项原文明确说明木星和土星有超过350个已证实的卫星，正确；D选项太阳系至少有150个卫星，错误，因此选C。
【解析】
1. 第1题：第一段先说明太阳系形成时间，再以问句“But what exactly is the solar system?”引出核心话题，属于通过提问展示主题，故选D。
2. 第2题：根据原文“Mercury, Venus, Earth and Mars are called ‘terrestrial planets（类地行星）’. They are mostly made of rock and metal.”，火星为类地行星，主要由岩石和金属构成，故选A。
3. 第3题：根据原文“The smallest planet is Mercury and the biggest is Jupiter.”，气体巨星包含木星，因此最大的气体巨星是木星，故选B。
4. 第4题：结合语境，“confirmed”修饰木星和土星的卫星，意为“已被证实的”，故选C。
5. 第5题：A项水星、金星无卫星，错误；B项地球有1个卫星，错误；C项与原文“Jupiter and Saturn are the planets with over 350 confirmed moons”一致，正确；D项太阳系至少有150个卫星，错误，故选C。
【答案】
1.D 2.A 3.B 4.C 5.C
【知识点】
英语阅读理解、细节理解、词义猜测
【点评】
本题为英语阅读理解题，围绕太阳系相关知识展开，题型涵盖主旨理解、细节查找和词义猜测，难度适中，学生只需仔细阅读原文定位关键信息即可作答，适合巩固英语阅读基础能力。
【难度系数】
0.6