1 . How many things can you see in the night sky? A lot! _______ a clear evening you might see the Moon and some planets. And _______ sparkling stars _______, too.

You can see even _______ with a telescope. You might see stars where you only saw dark space before. You might see that many stars look larger than others. You might see that some stars _______ look white _______ really red or blue.

But scientists believe there are some things in the sky that we _______. We can’t see them with the biggest telescope in the world, even when it is the clearest night of the year. That’s _______ they’re invisible. They’re the mysterious dead stars and they _______ black holes. You might find ________ hard to imagine that stars die. After all, our Sun is a star. Year after year we see it up in the sky, burning brightly, giving us heat and light. The Sun certainly doesn’t seem ________ getting old or weak, ________ stars do burn out and die after billions of years. As a star’s gases burn, they give off light and heat. But when the gas runs ________, the star stops ________ and begins to die.

So the next time you stare up at the night sky, remember: there’s more in the sky than that meets the eye. ________ amazing space it is!

Except Pluto, there ______ eight planets in the solar system now, including Earth. By the distance from the Sun from close ______ far, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto used to be known as the ______ planet in our solar system, and the furthest planet from the Sun. Pluto ______ in 1930, and was named by an eleven-year-old girl from England. Pluto is only half as ______ as the United States. This planet takes 248 earth years ______ around the sun. It means we need 6.5 earth days to ______ a day on Pluto. Pluto is about 40 times farther from the Sun than Earth is. Pluto is in an area of space called the Kuiper Belt ______ has thousands of small, icy objects. The temperature on Pluto is ______ low that Earth air would turn into ice soon. The gravity on Pluto is less strong than ______ on Earth. So fat persons may prefer to move there, they would weigh much less on Pluto.

3 . How many things can you see in the night sky? A lot! ______ a clear evening you might see the Moon and some planets. And ______ sparkling stars can be seen, too.

You can see even ______ with a telescope. You might see stars where you only saw dark space before. You might see ______ many stars look much larger than others. You might see some stars look white are really red and blue ______.

But scientists believe there are some ______ things in the sky that we never see. We ______ see them with the biggest telescope in the world, even when it is the clearest night of the year. That’s because they are the dead stars, which ______ black holes. You might find ______ hard to imagine stars die. After all, our Sun is a star. Year after year we see it burning ______ in the sky, giving us heat and light. The Sun doesn’t seem ______ getting old or weak. ______, stars do burn out and die after billions of years. As a star’s gases are ______, they give off light and heat. But when the gases run out, the star stops ______ and begins to die.

So the next time you stare up at the amazing night sky, remember: there is more in the sky than that meets the eye. ______ wonderful place it is!

4 . We know the Moon is our satellite（卫星）. It ________ round the Earth day and night. It ________ around once a month, every 29 and a half days.

The Moon is our ________ neighbour in space. It is ________ than the Earth. Plants can’t grow on the Moon ________ there is no air on it.

The Moon hasn’t ________ own light. It shines back the light of the Sun. When the Sun is shining on one side of the Moon, it looks like ________ big bright round ball. We can’t see the Moon when the Sun is shining on ________ side.

In fact, the Moon isn’t as near as it looks. It’s difficult for scientists to study on the Moon, but they will never stop ________ on it. I hope one day, we can take a trip to the Moon. It must be fun ________ into space.

5 . In the universe, there is the earth, the moon, the sun, the stars and all other things too far away ________. The earth is one of the sun’s planets（行星）, and the moon is our satellite. The moon is about three hundred and eighty thousand kilometers away ________ the earth, but it’s our ________ neighbour in space. It ________ more than three days to get there by spaceship. No man ________ farther than the moon, but spaceships ________ people have reached other planets.

Of ________ the stars, the sun is the nearest to the earth. ________ other stars are even bigger and brighter than the sun. They look small only ________ they are much farther away. You ________ see them in the daytime. But if you go out at night, you’ll be able to see many of them.

6 . “Hello, everyone! Welcome to Tiangong Class.” With this greeting, a special lecture began _____ Tiangong space station on Dec 9.

Lasting for about _____ hour, the space lecture was broadcast live to the students. “Three astronauts from the Shenzhou XIII crew — Zhai Zhigang, Wang Yaping and Ye Guangfu — hosted the lecture, showing _____ there and doing some interesting experiments that can only _____ in space. This is the second live space lecture in China. In 2013, with the help of other Sheinzhou X crew members, Wang decided _____ a speech to over sixty _____ schoolchildren across China.

Compared with the class eight years ago, this year’s space lecture is greatly different. According to Pang Zhihao, a Beijing-based space expert, the “classroom” is much _____. Instead of Tiangong I experimental module, this year Wang delivered the space lecture in the Tianhe space core module (核心舱) which is the biggest spacecraft developed by China.

Eight years ago, Wang _____ students the laws of physics and focused on the interesting phenomenon (现象) of weightlessness (失重) in space. _____ this year, biology was added. The astronauts compared the growth and shape of cells in artificial gravity (人工重力) and zero gravity in order to study their changing rules and mechanisms (机械装置).

“The spirit of science in the youth is an important driver of the progress of mankind,” Zhou Jianping, designer-in-chief of China’s manned space program; added. “Space activities can help _____ build the spirit of pursuing science and facing challenges.”