user: Read the following article and select the best answer. Article: Chemicals used for industrial processes often create dangerous forms of waste. The amount of these chemicals has risen heavily in the past few years, as more areas of the world industrialize and new products are produced. Over 80,000 different chemicals are used in industries world wide. Around the world hundreds of millions of tons of harmful waste are produced each year. Often, it is difficult and expensive to get rid of these chemicals or to store them in a way that does not endanger human life and the environment.      Every year, major health problems result from harmful waste. Sadly, it is often when someone has died or, become seriously ill that governments will take action and reduce levels of dumped harmful waste. In 1989, a school inprefix = st1 /New Jerseyhad to be closed because students there had suffered too much exposure to chromium. It was later learned that large amounts of chromium had been dumped nearby and blown over to the school area.      Research has been done to provide information on the effects of every chemical. Because waste chemicals often mix together, it will also be necessary to learn how the combinations of these chemicals affect human health.    Some governments have realized how serous the problem is and are making laws to get rid of harmful waste. They are also trying to limit the amount of waste industries are allowed to produce.    Not only governments but the public as well must form part of the solution. They can choose not to buy those products which require the production of harmful waste, attempt to affect policymakers, and produce less harmful waste themselves. Many scientists think that waste production can be cut. The waste can be reduced by at least one-third using existing technologies and methods. Question: From the text we know that   _  . - chromium can poison people when there is a wind - chromium pollution makes the local government close the school - Some governments don't realize how serious the problems are until people suffer a lot from harmful waste - about two-thirds of the waste can pollute the environment
Some governments don't realize how serious the problems are until people suffer a lot from harmful waste

Read the following article and select the best answer. Article: A Concussion  happens when the brain is shaken, often in a car crash or a fall or a strike on; the head in sports.Concussions can be mild, but doctors may order a CT scan to look for a more serious injury.But a recent study warned that more children than necessary are being exposed  to radiation this way. A national team led by two doctors at the University of California, Davis, studied hospital records from thousands of children with head injuries. They found that in many cases, the risk of developing cancer from the radiation outweighed the risk of a serious brain injury. The study found that one in five children over age two had a low risk of serious injury but received CT scans anyway. The same was true of almost one in four children under two years of age. The researchers have developed rules to predict if a head injury is serious enough for a scan. For children under two, doctors are advised against it if there is: *Normal mental activity. *No swelling in the back of the head. *No feeling of a broken bone in the skull.   *And no loss of consciousness for more than five seconds. Doctors should also consider how the child was injured and whether the parents say the child is acting normally. For patients from two to eighteen, the guidelines are similar ---- except there should be no l vomiting and no severe headache. Earlier this year, the British Journal of Sports Medicine published new guidelines for concussions in children and teens. International experts said they should not return to sports or school until fully recovered. The brain also needs a "cognitive rest," they say, by restricting activities like video games, texting and watching TV. It often take longer than adults to recover from a concussion than adults. The experts say individual progress and not a set time period should always guide a decision to return to play. Question: The researchers at the -University of California found that children who received CT scans - were likely to suffer brain injuries - wouldn't have normal mental activity - would lose consciousness now and then - were likely to develop canter
were likely to develop canter

Read the following article and select the best answer. Article: John Blanchard was studying the crowd making their way through the station. He was looking for the girl whose heart he knew, but whose face he didn' t, the girl with the rose. When reading a book in a Florida library a year before, John became interested not in the contents of the book, but in the notes penciled in the margin  . The handwriting reflected a thoughtful soul and beautiful mind. He discovered the former owner' s name in the front of the book: Miss Hollis Maynell. He located her address and wrote a letter introducing himself. The next day he was shipped overseas to serve in the army. During the next year, they grew to know each other through the mail and their friendship developed. John requested a photograph, but she refused, saying if he really cared, it wouldn' t matter what she looked like. When the day finally came for him to return home, their first meeting was suggested--7:00 pm. at the Grand Central Station in New York. She wrote," You' ll recognize me by the red rose I wear on my coat. "So now John was in the station to meet the girl with a rose. As a pretty and slim girl in green came over, John noticed her blue eyes like flowers in spring. He walked directly towards her , entirely forgetting she was not wearing a rose. As John came closer to her, he saw another woman with a red rose stood nearby. Well past 40, this woman had graying hair done under a worn hat. Seeing the girl in green walk quickly away, John felt as if he were split  in two. He desired to follow that girl, but longed for the woman whose spirit had truly companioned and supported him. The woman looked gentle and sensible. John went to her, saying, "1' m Captain John Blanchard. You must be Miss Maynell. I am glad to meet you here. May I take you to dinner?" She replied with a smile, I don' t know what this is about. But the lady in green who just went by, begged me to wear this rose on my coat. She said if you asked me out to dinner, l' d tell you she is waiting for you in the big restaurant across the street. She said it... Question: What happened to John after getting in touch with Miss Hollis Maynell? - He began to serve the army abroad. - He was seriously wounded in the war. - He went on a business tour in Europe. - He asked Miss Maynell for a photo.


assistant: He began to serve the army abroad.