Read the following article and select the best answer. Article: Every vehicle needs tires, but eventually they wear out. Roads wear out too, and they often need repairing. But new research by a pair of teens suggests the rubber from worn-out tires could lengthen the lifetime of asphalt pavement. Also roads made with this material might need fewer patches . The young researchers presented their findings in May, 2014, as finalists at the International Science and Engineering Fair (ISEF). The 64th annual Intel ISEF shows some of the best high school science projects from around the globe. Many roads are made with asphalt, which requires much petroleum. But Jordan is a country that has very few oil wells or other sources of petroleum, notes Mohammad Salameh, who is a 10th-grader at the International School in Amman, Jordan. For Jordan, having to import most of the country's petroleum adds greatly to its cost, the teen notes. The extra expense means that there's less money to build and maintain roads. That has resulted in poorer quality roads. As a result, those roads need to be patched almost constantly. Therefore, 16-year-old Mohammad and his research partner, 15-year-old classmate Adam Belaid, came up with the idea of adding rubber to asphalt. But that rubber can come from old tires. Even a worn-out tire contains much rubber, which means the material should be plentiful, says Mohammad. Drivers in Jordan replaced 9 million tons of tires between 2006 and 2010, and only 0.3% of that rubber was recycled. That leaves much rubber that could possibly go into road construction. But first the teens had to show adding rubber to asphalt resulted in better roads. To test their idea, they created several different asphalt-rubber recipes. They also tried out different temperatures at which the mix was heated. And their tests suggested that when the surfacing material includes 8% rubber, it should hold up for 10 to 15 years of traffic instead of the normal 5 years. And their recipe should reduce the need for patching worn areas from once a year, to maybe once every 5~7 years... Question: We can know from the passage that in Jordan . - the roads are the worst across the world - many people are interested in recycling old tires - a typical road is replaced every five years or so - most roads require patching once every five years
a typical road is replaced every five years or so

Read the following article and select the best answer. Article: When I was a kid, I always used to wonder how in the world my father work outside in the winter without a coat. It could be minus 20 degrees centigrade and there'd be Dad, removing snow, or perhaps chopping some wood --- his coat thrown aside--- wearing a shirt , a cap, and a pair of gloves. "Aren't you cold, Dad?" I'd ask. "No," Dad would reply. "I'm not cold--- working too hard to be cold." Many times I wondered whether my father was an extremely tough man, or whether he was foolish. One time when I was quite young, perhaps five or so, I went ice fishing with Dad. It was a bright, clear day--and bitterly cold. After we'd been out on the ice for a little while, my feet started getting cold. "Daddy, my feet are cold." I said. "Yeah, it's cold out here today," he replied. "Tell you what," he said. "Walk around. Make some circles in the snow. See how many different patterns you can make. That will get your feet warm." Now, I was just a little girl at the time but I remember thinking, "How in the world will walking around in the snow make my feet warm? Dad must be out of mind. But he was my father, after all. I made circles in the snow. I made squares. Pretty soon I was having so much fun making patterns in the snow. I forgot about my feet being cold. Now, all these years later, I know, too, from personal experience how my father was able to take his coat off and work outside in the winter wearing just a shirt, a cap and gloves. Because I do it, too. "Aren't you cold?" my husband asked one winter day. "No," I replied. "I'm not cold--working too hard to be cold." I hope my husband has decided I'm both tough and smart. But I guess quite a bit of the time he thinks I'm foolish. Wherever Dad is in that great big farm in the sky--I'm sure he can't help but smile whenever I take my coat off while I'm working outside in the winter. Question: When the author's feet felt cold, her father advised her to _ . - go home alone first - keep walking in the snow - draw pictures in the snow - light a fire on the ice
keep walking in the snow

Read the following article and select the best answer. Article: During the next several weeks I went completely to the wolves. I took a tiny tent and set it up on the shore of bay. The big telescope was set up in the mouth of the tent in such a way that I could observe the wolves by day or night. Quite by accident I had pitched (set up) my tent within ten yards of one of the major paths used by the wolves. Shortly after I had taken up residence one of the wolves came back and discovered me and my tent, but he did not stop or hesitate in his pace. Later, one or more wolves used the track past my tent and never did they show the slightest interest in me. I felt uncomfortable at being so totally ignored. The next day I noticed a male wolf make boundary markers by passing water on the rounds of his family lands. Once I had become aware of the strong feeling of property rights which existed among the wolves, I decided to use this knowledge to make them at least recognize my existence. One evening, after they had gone off for their regular nightly hunt I staked out a property of my own, including a long section of the wolves' path. In order to ensure that my claim would not be overlooked, I made a property mark on stones, dumps of moss, and patches of vegetation with a lot of tea. Before the hunters came back, task was done, and I retired, somewhat exhausted, to observe results. A few minutes later, the leading male appeared. As usual he did not bother to glance at the tent, but when he reached the point where my property line intersected (cut across) the trail , he stopped as suddenly as if he had run into an invisible wall. Cautiously, he extended his nose and sniffed at one of my marked bushes. After a minute of hesitation he backed away a few yards and sat down. Then, he looked directly at the tent and at me. His glare seemed to become more fierce as I attempted to stare him down. The situation was becoming intolerable. To break the impasse I turned my back on the wolf. Then quickly and with an air of decision, he turned his attention away from me and began a... Question: What was the author's discovery? - Wolves were not settled beasts , as is almost universally believed. - Wolves were settled beasts and the possessors of an estate with definite boundaries. - Wolves were not interested with strangers. - Wolves' family was dominated by a female.
Wolves were settled beasts and the possessors of an estate with definite boundaries.