Read the following article and answer the question. Article: Carbon monoxide poisoning causes death and injuries around the world. This gas is a problem in all parts of the world that experience cold weather. A few years ago, America's Centers for Disease Control (C. D. C.) studied deaths linked with carbon monoxide poisoning. It found that the number of carbon monoxide deaths in the United States was greatest in January. The C.D.C. also found that carbon monoxide kills more than four hundred Americans each year. And, it said more than twenty thousand people are taken to hospital for treatment of health problems linked with the gas. Carbon monoxide is called the silent killer because people do not know it is in the air. The gas has no color, no taste and no smell. It does not cause burning eyes. And it does not cause people to cough. Yet, carbon monoxide gas is very deadly . It steals the body's ability to use oxygen. Carbon monoxide makes it difficult for the blood to carry oxygen to body tissues . It does this by linking with the blood. When the gas links with the blood, the blood is no longer able to carry oxygen to the tissues that need it. Damage to the body can begin very quickly from large amounts of carbon monoxide. How quickly this can happen depend on how long a person is breathing the gas and how much gas he or she breathes in. Carbon monoxide poisoning has warning signs . But people have to be awake to realize them. Small amounts of the gas will cause a person's head to hurt. He or she may begin to feel tired. Their stomachs may feel sick. The room may appear to be turning around. The person may have trouble thinking clearly. People develop serious headache as the amount of the gas continues to enter their blood. They will begin to feel very tired and sleepy. They may have terrible stomachache. Doctors say carbon monoxide influences people differently. For example a small child will experience health problems or die much sooner than an adult. The general health of the person or his or her age can also be important. Question: Which of the following is TRUE according to the passage? Answer:
OPTIONS:
- Carbon monoxide poisoning seldom happens in cold areas.
- Twenty thousand Americans are killed by carbon monoxide each year.
- Most people know whether there is carbon monoxide in the air.
- Carbon monoxide stops the blood from carrying oxygen to body tissues.
Carbon monoxide stops the blood from carrying oxygen to body tissues.

Read the following article and answer the question. Article: In the 1920s and 30s the airlines were just beginning. It was unusual for people to travel by air because it was expensive and dangerous. In those days, there were no flight attendants to look after the passengers. Young men ,or "stewards" helped the passengers onto the airplane and carried the passengers' luggage but they did not provide food and drinks. _ Ellen Church was born in 1904 on a farm in Iowa. She was a different child. She didn't want to work on a farm or marry a farmer --she wanted a more adventurous life. Ellen studied to be a nurse at the University of Minnesota and then got a job in a hospital. For the next few years she stayed at the hospital but also took flying lessons and got her pilot's license. Ellen was twenty-five years old when she first got in touch with Boeing Air Transport. She loved flying but she understood that airlines were a man's world. Although women like Emelia Earheart were becoming famous, she realized it was impossible for a woman to have a career as a pilot .But she had another idea. Most people were frightened of flying because. flying was still an unreliable way to travel. There were often delays ,many crashes and the bad weathers made many passengers sick. Ellen thought nurses could take care of passengers during flights and B.A.T. agreed. The young woman from Iowa and seven other nurses became the first air stewardesses. At first pilots were unhappy because they did not want stewardesses on airplanes, but passengers loved the stewardesses. In 1940 there were around 1000 of them working for different airlines. The early "stewardesses" had to be under twenty-five-year-old, single and slim. When a woman joined an airline, she had to promise not to get married or have children. It was hard job and not well paid. They worked long hours and earned $1 an hour. In the 1970s, stewardesses were unhappy in their job and airlines had to make some changes. Since the 1970s, "stewardesses" have been called flight attendants. They are well paid and work fewer hours than in the past. Question: According to the passage, in the 1940s a woman had to _ if she wanted to be a stewardess. Answer:
OPTIONS:
- be a nurse
- be married
- be a mother
- be young

Answer: be young

Read the following article and answer the question. Article: Climate is the average weather usually taken over a 30-year time period for a particular region and time period. Climate is not the same as weather, but rather, it is the average pattern of weather for a particular region. Weather describes the short-term state of the atmosphere . The climate is changing. Many agreed that climate change may be one of the greatest threats facing the planet. Recent years show increasing temperatures in various regions, and/or increasing extremities in weather patterns. Is the Earth getting warmer? Yes! The Earth has warmed by about 1degF over the past 100 years. But why? Well, scientists are not exactly sure. The Earth could be getting warmer on its own, but many of the world's leading climate scientists think that things people do are helping to make the Earth warmer. Global Warming may be a big problem, but can you make a difference? Yes! There are several little things you can do to make a difference. Try carpooling. This will help reduce the amount of fossil fuels going into the atmosphere. Whenever you use electricity, you help put greenhouse gases into the air. Turn off lights, the television, and the computer when you are through with them. Also, planting trees is fun and a great way to reduce greenhouse gases. Trees absorb carbon dioxide, a greenhouse gas, from the air. Finally, don't forget about recycling. Question: The Earth has warmed by about 1degF over the past 100 years_. Answer:
OPTIONS:
- only because of human activities
- but scientists are not exactly sure of the reasons.
- and we can do nothing to it.
- and it's getting warmer on its own
but scientists are not exactly sure of the reasons.