【推荐1】The first astronauts(宇航员)

Since the earliest times, people have looked up at the stars, the moon and the planets. Today people use modern machines_______at the sky. This is very different from the situation_______years ago when people could only use their eyes. Perhaps they dreamed of _______   the universe. When did humans first go into space? The story began not so very long ago,_______the firstastronauts were not people-they were animals. Scientists wanted to make travelling to space as _______as possible for humans. So they decided to experiment with animals and test_______in spaceflights. Insects, mice, frogs, dogs and monkeys were some of the animals_______first went into space. Many of them_______, but they helped to make space travel safer for humans. For their great service, we _______forget these animals. Albert I was the first monkey to go into space in 1949. Sadly he died________   his space ship landed back on Earth.

【推荐2】Our earth gets _________ warmth and light from the sun. The sun is a huge blazing(酷热的)ball, a _________ times larger than the earth. And it is _________ of miles away. The earth spins(旋转)round once every 24 hours. It turns to _________ the sun and spins away every 24 hours.

When our part of earth looks on to the sun, we see sunlight and we have _________. When our part turns away from the light, we have _________.

When our part begins to turn towards the sun and we see the first sunlight, we call it _________. When we are facing the sun most directly, it is _________. Then the sun is _________ to begin straight (直接地)above us. When we begin to turn away from the sun, we have afternoon, evening and __________.

【推荐3】The universe (宇宙) is everything out in space. Nobody _______ how large the universe is. When we talk about the universe, we _______ the Earth, the Sun, the Moon and all the stars, and the space between them.

Now let me tell you something about the _______. It is like a large ball. It _______ around the Sun. And _______ and land cover it. If you are in a spaceship and _______ the Earth from space, you will find that there are some large blue parts. They are the seas and about 70% of the Earth’s surface (表面) is water.

We live on the outside part of the Earth. Around us is the air. It takes the Earth 24 hours to turn in a full _______. When you see the Sun shining _______, it’s the day for you. But when the Earth turns you away from the Sun, everything around you becomes _______.

Can you tell me something else about the universe? I’m ________ in it and want to learn more about it.