Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: People who are worried about bad breath often reach for a toothbrush or a gun. But in the future, personal breath monitoring may include far more than fresh breath. In face, breath is so rich in chemical compounds that fully understanding it has proved challenging. Each breath contains gases like carbon dioxide, the volatile remains of recent snacks, medicines and even compounds taken in from things like carpeting or various kinds of air pollution. But breath detectors can sort out these substances with increasing sensitivity . Scientists are building electronic sniffers that examine the exhaled air for signs of cancer, asthma , and other diseases. "There are clear signatures in the breath for liver disease, kidney disease and heart disease. Breath is a rich mixture that can reflect out state of health and disease." said Dr. Raed Dweik, director of the Cleveland Clinic, adding "Breath analysis is the future of medical testing." He and his partners are testing a desktop system called BreathLink for use in rapid identification of diseases. The system is designed to work wherever there is an Internet connection. To use BreathLink, a person breathes into a long tube, and a breath sample is collected and analyzed within the system. Then it can detail chemical concentrations of the breath in graphics. Dr. Raed Dweik said, "If you examine patients of asthma, you will find they have higher levels of nitric oxide in their exhaled air. It reflects their abnormal symptoms in the lungs." His tests have reached 85 percent accuracy so far in spotting people with some illness. But some trained dogs, he pointed out, can sniff out cancer with 99 percent accuracy--although without the ability to identify particular compounds the way some detectors can. "We are getting better and better," he said. "But whether we will ever approach the accuracy of the dog--we don't know." Question: What is the breath detector used for? Options: A: To find what kind of disease a person has. B: To identify substances from people's breath. C: To help a patient recover from disease. D: To smell how bad the breath is.
Ans: B

Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Last summer holiday, I took a trip to Yunnan. It is in the southern part of our country .It is really a very beautiful place-grand mountains, clean rivers and kind people. Trees and flowers are seen everywhere. Every year there are lots and lots of visitors. Maybe you have heard about Shi Lin (stone forests). There are all kinds of strange stones. Some of the small stones look like graceful girls; and the big stones look like handsome men. Other stones look like cats, peafowls, double-edged swords, mice, elephants and so on. Of all the stones, the stone like a beautiful girl in a legend is the most famous .Its name is A Shima. I also went to Li Jiang. The roads in that city are just like the Eight Diagrams. Any road in the city goes to the center of Li Jiang. A river runs through the whole city. If you go along the river, you'll never get lost. There are many ethnic minority people in Yunnan. They are very cordial. And they all like singing and dancing. We danced with them around the campfire that night. I really had a good time. I like the elephants and fruits there best. An elephant is even taller than me! I even mounted the elephant, though I was very afraid at first. But the elephant seemed very friendly. I took some photos with it. The fruits there are very fresh and delicious. They are very good for our health. The trip to Yunnan impressed me greatly. I will never forget it. Question: Which of the following is not true? Options: A: There are all kinds of strange stones in Stone Forests in Yunnan. B: Some of the stones look like animals while some others like people. C: The elephant is tall and fierce to visitors when it's hungry. D: LYunnan had a nice impression on the writer.
Ans: C

Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Hong Kong is one of the most densely populated cities in the world, but with night skies around 1,000 times brighter than globally accepted levels, it gains a bad reputation for its light pollution. A study by Hong Kong University found that brightness levels in the southern Chinese city's popular shopping district of Tsim Sha Tsui were 1,200 times greater than the international dark sky standard. The crowded city of 7 million residents , full or residential high-rises, towering office blocks and neon advertisements, has no laws to control outdoor lightning. The result is that light pollution is thought to be much worse than in other large cities, including London, Sydney, Tokyo and Shanghai. "In Hong Kong , you can't go anywhere outdoor in the evening without your eyes being blinded by this really disturbing outdoor lightning," the light pollution survey's head Jason Pum told AFP. "The fact that we have all this light in the sky means energy is wasted," he said, adding that too much artificial lightning also affects nightly wildlife. Research has suggested that light pollution can cause a number of harmful health effects in humans, including sleeplessness and headaches and can also interrupt body clocks and hormones . The university survey, the result of five million measurements taken from points across the city, was released just days before the start of the annual Earth Hour event, organized by the World Wildlife Fund. People around the world will be encouraged to turn off the lights for an hour on Saturday night to raise awareness of climate change. Last year, a number of Hong Kong's major buildings along Victoria Harbour went dark to mark Earth Hour. "Anyway, we should do our best to reduce the amount of lightning and adjust it for the benefit of the environment." Question: .We can know from the passage that _ Options: A: light pollution in Hong Kong is among world's worst. B: light pollution is the biggest problem in Hong Kong. C: Earth Hour is simply organized to reduce pollution. D: light pollution is the primary causes of sleeplessness.
Ans:
A