完形填空：

阅读下面短文，掌握其大意，然后从1～10各题所给的四个选项中，选出一个最佳答案．

　After the end of the Second World War, the Russians became very interested in space science, and they sent several rockets up above the air. The earth is surrounded by air, but this air doesn't stretch (延伸) upward for more than a few hundred miles, and 　1 　only about ten miles the air is so thin that no ordinary plane will fly in it. To go higher it is necessary to use a rocket, which will work excellently even when moving in outer space. The first rockets 　2 　into space carried no astronauts but scientific instruments (仪器), the next carried animals and when they were brought safely to the earth, the Russian scientists 　3 　a man. They chose Yuri Gagarin to be the pilot.

　Flying a space ship is 　4 　flying an ordinary plane. Instead of sitting at the controls, the pilot lies upon a couch (睡椅).

　The spaceship was travelling 　5 　5 miles a second—faster than any man travelled before. Gagarin did not get any feeling for the speed, and he could 　6 　the small round window of the cabin (船舱).

　Gagarin was busy doing scientific experiments. Before long the spaceship passed into the Earth's Shadow. When it came out of the shadow again, the horizon (地平线) showed a bright orange colour. In space the sky looked black even when in the sunlight. It is only from the earth 　7 　the sky looks blue. When we look at the sky, we see the sunlight lighting up the air all around the earth. The air has 　8 　the other colours in sunlight, but reflects (反射) the blue light, which we see. In space there is no air to split up the sunlight.

　Now, it was time for Gagarin to prepare for landing. This was perhaps the most dangerous part of the whole trip. If he came into the air too quickly, his ship would 　9 　the air, and this would make the ship so hot that it would burn up. The speed of the spaceship had to be controlled.

　The spaceship dropped closer and closer to the ground until, when not far from the ground, Gaggrin's cabin 　10 　the rest of the rocket. Then the cabin, together with Gagarin, flew gently down to a safe landing.

阅读下面的短文，从A、B、C、D四个选项中选出最佳选项。

　　Dorothea Shaw is 71 years old and nearly blind，and she chooses to live alone far away from people in Blize．Her home is in a small village which can be 　1　 only by sea or air．After a 10-mile walk into the hills，one 　2　 reaches a piece of land and two smal1 houses so 　3　 in the thick over-grown forest that only a 　4　 of people know．Dorothea is there．

　　She lives 　5　 and totally 　6　 vegetables． Sometimes a local man will come and cut 　7　 for her and a group of soldiers will come 　8　 her and be greeted with the 　9　 of a cup of coffee．

　　At night，she lies in her little room with the dogs and cats on the floors and 　10　 for hours to any Spanish，English，German or French 　11　 she can find on her 　12　．Sometimes she gets lonely but 　13　 of the time the animals

and the radio are company enough．

　　But recently the very things she had 　14　 to get free from so well have begun to 　15　 her．The peace of the forest has been 　16　 by the noise of earth-moving machines．What she once only heard of 　17　 on the radio is now on her 　18　 ．Things began to change 3 years ago． The new main north-south road in Blize has 　19　 the forest only or five miles away．“Now 　20　 people know I'm here，”she says，“I feel more and more uneasy （troubled or anxious）each day．”

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