一 根据你知道的天体运行知识，判断下列说法是(T)否(F)正确。
()1. Earth travels around the Sun.
()2. The Moon travels around Earth.
()3. Satellites are all natural(天然的;非人为的) in space.

1. T 2. T 3. F

二 晚上，Ann正和弟弟Jim看星星。 选择合适的单词或短语，补全对话。
Jim: Look! How bright! They look like lights.
Ann: Yes! Some are planets, and some are 1. A. clouds B. stars .
Jim: What's that big round thing?
Ann: It's the 2. A. Moon B. Sun . It travels around Earth.
Jim: Can we see Earth from here?
Ann: No, because we are 3. A. on Earth B. in space now—we can't see the whole(整个的) Earth. Some 4. A. planets B. satellites travel around Earth too. They help us watch the weather.
Jim: Wow! Space is so interesting!

1. B 2. A 3. A 4. B

三 阅读短文，完成任务。
Look at this picture. It's a part(部分) of our solar system.
• 1. The Sun is a very big star. It is hot and bright.
• 2. Earth is a planet. It travels around the Sun.
• 3. The Moon travels around Earth. We can see the Moon and many stars at night.
• Now, people also send satellites into space. They travel around Earth too. They help us learn about weather, take photos, and even help us talk on the phone.
We live on Earth. It is our home. We should take good care of it.
任务一:根据短文内容,将各个部分所描述的天体编号写在对应横线上。
任务二:在图中为文中画线的这种天体画出恰当的运行轨迹。
任务三☆:假如你观察到一颗地球的卫星,请结合短文并查阅资料,完成对它的介绍。
It travels around . It can .

任务一:1. A 2. C 3. B
任务二:在图中,为卫星(satellites)画出围绕地球(Earth)运行的轨迹。
任务三:Earth; show people places on a map, help with TV pictures, and let teachers and students talk in an online class(供参考)