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The wide spread of the photographic industry has led to a greater demand for skilled technicians in darkrooms and photographic laboratories. However," qualified workers are hard to find, because not many people seem to be attracted to this kind of work. Some people like to take pictures during their holidays, but they seldom produce their pictures all by themselves-that is the work of a photographic technician. Although it may not be easy to spend a full working day in the darkroom, it can be very satisfying to produce carefully processed photographs. Especially, if one can produce a very good photograph of high quality, his sense of achievement is gained.Besides achieving job satisfaction, the photo technician can move on into production if he or she desires. For instance, the technician may choose to learn related skills such as photo restoration or photo retouching. Of course, these will make photo production more like an art, and it is not easy to become skilled in these kinds of work.Although it is a good idea to seek classroom theory and technical knowledge, the individual interested in becoming a darkroom technician will learn the most by actually working in a photographic laboratory. The use of photography in research and development is increasing; therefore, the need for more technicians will undoubtedly increase. In processing photos, you will feel（）if the photos turn to be very good.
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The air inside .a house on office building often has more contaminants（）the heavily polluted air outside.
The spaceship flew around the new planet several times. The planet was blue and green. They couldn’t see the surface of the planet because there were too many white clouds. The spaceship descended slowly through the clouds and landed in the middle of a green forest. The two astronauts put on their space suits, opened the door, climbed carefully down the ladder, and stepped onto the planet. The woman looked at a small control unit on her arm. "It’ s all right," she said to the man. "We can breathe the air... it’ s a mixture of oxygen and nitrogen. " Both of them took off their helmets and breathed deeply.They looked at everything carefully. All the plants and animals looked new and strange. They could not find any intelligent life. Are there any intelligent lives on the planet（）
How did they get thereFour men were sitting in a bar in London, having a drink. They were talking about dogs."If you want to buy a nice dog," said the first man. "One of my greyhounds is racing in Manchester this evening. Why don’t you come and watch the race If you like the dog, you can buy it. ""I’ 11 buy it if it wins the race," said the second man."And I’ 11 buy it if it loses the race," said the third man."My family won’ t let me get a dog, but I’ d like to come and see the race," said the fourth man.They all went to Manchester to see the race, but they went there in different ways, the first man by car, the second man by plane, the third man by train and the fourth by bus.To cut a long story short, the dog won the race; the second man bought the dog from the first man, and they went to a restaurant to celebrate.While eating, they discussed the different ways of getting to Manchester, and wrote the information on the tablecloth, like this:Length of JourneyCost of journeyFirst man (by car)3hrs 30mins￡ 8.00Second man (by plane)45mins￡ 22.00Third man (by train)2hrs 30rains￡ 14.80Fourth man (by bus)4hrs 30nfins￡ 6.00Charlie said, "Well, that’s interesting. My journey was quicker than Albert’s or Dave’ s. ""That’ s right," said Albert, "but mine cost less than yours, Charlie, and less than Dave’ s. ""I don’t care how long a journey, takes," said Dave, "you’ll never see me in a plane. I’m terrified of flying."Bill didn’t say anything; he was wondering what his wife would say when he came home with a dog.The first man who went by car is (46) .The second man who went by plane is (47) .The third man who went by train is (48) .The fourth man who went (49) is (50) . 47（）
Early this year, Captain Startup was flying an aeroplane over New Zealand. There was a television camera crew on board. Suddenly, out in the night sky, a bright sphere came into view. Everyone on board saw it and everyone thought, "UFO" —Unidentified Flying Object. Many people believe that a UFO is a visiting craft from outer space. The camera crew went into action and started filming. That week people all over the world saw the film of this mysterious light on their television screens. Someone described the object as "a shining ping pong ball". What was it Was it a spaceship full of visitors from another planet The Captain and the film crew believed it was. Other observers had many different explanations. Some say it was Venus. Some say it was just a trick of light. The people on the aeroplane were not the only ones who saw the "UFO". An air traffic controller also saw it on his radar screen. When a reporter asked him if he believed in UFOs, he said, "I don’ t know what they are, but I’ ve got an open mind on them. " Like many scientists, he thought that a flock of birds caused dots on his radar Screen when the UFO appeared.Most astronomers now believe that what these people saw was almost certainly the planet Venus. At that time of year it is very bright and easy to see. And from a moving aeroplane it can appear to be moving fast. So far there is no proof that UFOs or spaceships from other planets do exist. Which of the following statements is NOT true（）
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