单选题Weather changes when the temperature and the amount of water in the atmosphere change. We can see and feel water coming from the atmosphere when we have rain. But the water must somehow get back to the atmosphere. Meteorologists call this the water cycle. There are many stages in the water cycle. Rain falls when water vapor in clouds condenses (凝结). Drops of water form and fall to the ground. The water soaks into the ground and feeds streams and rivers. A lot of rain falls into the sea. The heat of the sun evaporates some of the water in the ground and in the rivers, lakes, and the sea. It changes the liquid water into water vapor. The vapor rises onto the air. Water vapor is normally invisible. On a very damp of humid day, however, you can sometimes see water vapor rising from a puddle (水坑) or pond in a mist (薄雾) above the water. Water vapor also gets into the air from living things. Trees and other plants take in water through their roots and give off water vapor from their leaves. People and land animal drink water and breathe out water vapor. In all these ways the water returns to the air. There it gathers to form clouds and condenses to form rain. The rain falls to earth, and the cycle starts again. It continues even if snow or hail (冰雹) fall instead because both eventually melt to form water. The amount of water vapor in the air depends on the temperature. The air is more moist (潮湿) in the tropics (热带) than in the cold polar regions.

单选题Animation means making things which are lifeless come alive and move. Since earliest times, people have always been astonished by movement. But not until this century have we managed to take control of movement, to record it, and in the case of animation, to retranslate it and recreate it. To do all this, we use a movie camera and a projector (放映机). In the world of cartoon animation, nothing is impossible. You can make the characters do exactly what you want them to do. A famous early cartoon character was Felix the Cat, created by Pat Sullivan in America in the early nineteen twenties. Felix was a wonderful cat. He could do all sorts of things no natural cat could do like taking off his tail, using it as a handle and then putting it back. Most of the great early animators lived and worked in America, the home of the moving picture industry. The famous Walt Disney cartoon characters came to life after 1928. Popeye the Sailor and his girl friend Olive Oyo were born at Max Ficischer in 1933. But to be an animator, you don't have to be a professional(专业人士). It is possible for anyone to make a simple animated film without using a camera at all. All you have to do is to draw directly onto an empty film and then run the film through a projector.

单选题—How long are you staying? —I don't know. A．That's OK B．Never mind C．It depends D．It doesn't matter

单选题I ______ to speak to you all these days.

单选题The door. We'd better have it repaired.[A] isn't shut[B] hasn't been shut[C] won't be shut[D] won't shut

单选题You can use your Business Telecard International at any card phone in the United Kingdom. Here is some information about making international phone calls. You can now phone almost any country in the world, although in some cases you can only call big cities. When you cannot make direct dialing calls, you can ask the international operator to help you. This is more expensive and takes more time, but it may be helpful if you want to speak to a particular person and no one else, in this case you should ask for a "person-to-person" call. Even more expensive is a reverse charge call where the person who receives the call pays. If the international line is busy, you can reserve(留下) a call, explain the number you want and the operator will call you back when the line is free. You can save money by calling outside office hours, for example, early in the morning, late at night, and on Sundays. Remember that the time may be different in the country that you are calling. International time is based on GMT (Greenwich Mean Time). London is on GMT and Moscow, for example, is 3 hours ahead. There is one problem: change to DST (Daylight Saving Time) for the summer. In the UK, clocks are put forward one hour in spring and put back in autumn, and so London is actually one hour ahead of GMT in the summer.

单选题Once upon a time, in a solar system there were two planets. Their names were Yee and Lan, and they loved each other very much. But they were a little sad, because it was so long between times that they got to be near each other. Most of the time they had to gaze from afar. Centuries went by, and one time as they passed, reaching out through the cold and emptiness, Yee slipped Lan a moon, because Yee had three and Lan had none. Lan looked so perfect with the new moon that all the other planets were a little jealous; and Yee didn't mind giving up that moon at all. So the planets kept on dancing to the music of the universe, and Lan's moon was admired by all, until one day an evil-minded ice-hearted comet viciously slammed into it, shattering it into a thousand pieces. At that time, Yee was all the way on the other side of the sun and couldn't hear the wails that rocked Lan through and through. After so long they were together again. Lan was almost afraid to look at Yee, but Yee reached out a wisp of atmosphere in comfort. He hesitated a minute, but then went ahead and smashed the two remaining moons together so that Lan would have no reason to feel bad. So around and around they went, much in love that they thought they would burst, even though they looked a little bare, and felt a little cold without their lovely moons. But then, something beautiful happened-their shimmering bits of moon dust started to flatten out, and make two large circles, one for each of them. And before too long, the circles became rings, great big wonderful rings, sparkling in the pure sunlight, the wonder of that solar system. And that is why when two people have so much love that they'll give each other rings, in memory of the planetary love of Yee and Lan.

单选题Many years (Example: (0) ) , life was (41) than it is today. People didn't have modem machines. There was no modem medicine, (42) . Life today has brought new problems. One of the biggest is pollution ( 污染 ). Water pollution has (43) our rivers and lakes dirty. It kills fish and affects( 影响 )our drinking water. Noise pollution makes us talk louder and (44) . Air pollution is the most serious kind of pollution. It affects (45) living thing in the world. Cars, planes and factories all pollute our air every day. Many countries are making laws(法律) to stop pollution. Factories, must from now on, clean their water (46) away, they mustn't sent out dirty smoke into the air. We need to do many other things. We should put waste things in the dustbin(垃圾箱) (47) throwing them on the ground. We can go to work by bus (48) with our friends in the same car. If (49) people driving, there will be (50) pollution.

单选题Whatwillthespeakersdiscuss?A.Awashmachine.B.Acomputer.C.Areport.

单选题Where does the man get his job?

单选题I am looking forward to ______ from you as soon as possible.[A] hear[B] be heating[C] heating[D] have heard

单选题-- You look very pale. You ______ very tired.-- I didn't sleep at all last night.

单选题These two vases are so ______ that we can't tell one from the other. A. unusual B. different C. same D. similar

单选题When __________ into anotherlanguage，the poem reads strange.

单选题Mexican fans and their contribution to football culture are simple to spot. At certain points of sports events, sections of a stadium crowd will suddenly stand up, wave their arms in the air, roar for their team and then sit down again. Others next to them jump to their feet seconds later. The combined movements look like a wave, rippling around the stadium. "The Mexican wave" went global at the 1986 World Cup in Mexico. While there may have been waves before, this was the first time " La Ola", as the Mexicans call it, featured widely on TV. While Mexicans will no doubt be making waves in Germany, another famous export may not be appearing. Mexican TV"s celebrity clown Borzoi, the creation of comedian Victor Trujilo, reported from the last three World Cup"s. Trujilo stopped playing the character after his wife"s death in 2004. Sadly for fans, crowd-pleasing striker Guauhtemoc Blanco will definitely not be there. The 33-year-old is famed for his "bunny hop", where he hops past opponents with the ball clasped between his ankles. Last week he complained about being left off the team, saying there was "no valid argument" for leaving him behind.