Houses fall down. Trees fall over. Large holes form in the ground. Could Alaska be sinking? That's what some villagers in Alaska have been asking themselves recently--and scientists think they know why. Warmer temperatures may be causing Alaska's frozen ground to thaw . About 85 percent of Alaska's land surface has _ . Permafrost supports the ground above it--including trees, houses, and roads. But why is the permafrost thawing? Some scientists say that human-caused pollution is leading to global warming. And most scientists agree that Alaska has been getting warmer. They say that the warmer temperature is causing permafrost to thaw in some areas. The thawing permafrost can cause problems for people, plants, and animals. "The collapsing is a problem in the villages in Alaska which are built on permafrost, and some of them may have to move to safer ground, where there is no permafrost," Weller said. The Alaskan town of Glennallen saw its old post office collapse. And, according to James Walters, a permafrost expert at the University of Northern Iowa, house-moving companies have been very busy. "Melting permafrost can also destroy trees and forests," Weller said. "When holes in the ground form, trees fall into them and die. This could turn a forest into a swamp , and animals which need the forest will have to move elsewhere." The melting could cause "severe problems." Weller says: "This could take hundreds of years, but in the end Alaska will look quite different from what it looks like now." Which of the following can be used as the best title of the passage? A) Alaska--A Frozen Land B) Is Alaska Sinking? C) Pollution and Global Warming D) Alaska is polluted.
B
Every student wants to learn English well, but how can we learn it well? It's a good topic for English learners. Here are some good methods, which can help you improve your English quickly. First of all, you must have correct attitude. Please love English, not hate it. And you don't feel shy when you say or speak English. Remember one sentence: _ Secondly, I think grammar rules, new words and phrases are important, but they are not enough. For example, some people are quite good at grammar and learned a lot of English words and phrases. But they can't speak English when they meet foreign friends. The most effective way to learn English well is to often use English. Don't be afraid and don't laugh at others. We'd better listen, speak, read and write more. You can go to English corner, talk with foreigners or talk with your friends. If you have time, listen to the radio or English program. Listening to this good material can help you improve your listening and understanding. And then, you can read English books, newspapers or novels. They are wonderful. You can use the internet, chat with net-friends or write E-mails, dairies ...Through these ways, you can get more for your English. English isn't so difficult that we can't learn it well. As long as we set our mind to learn English well, I'm sure everyone will be successful. Which of the following can be the best title of the passage? A) How to learn English well B) English isn't difficult C) Use English often in your life D) Grammar learning is not enough
A
Q: When I was ten my dad helped me buy my first ten-speed bicycle from Allen. I put up $60 of my grass cutting and snow shoveling money and my dad put up the other half I would pay him back over the next six months. Although it was not in the latest style, it was my ticket to the adult world. I spent that summer and autumn riding happily. My sister Liz, a prisoner of her five-speed bicycle, never had a chance to keep up. Just before the Christmas deadline to pay my dad back, we were hit with several snowstorms. This allowed me to shovel enough driveways to pay off my debt. I was now officially a bike owner; it was a feeling unlike any other. On that Christmas morning, my dad gave me a used portable record player. I was excited. However, my joy was short-lived after my dad called my sister to the kitchen. "We have one more gift for you." he said as he opened the door that led to the garage. There, on the steps, stood a new ten-speed bicycle. "It's not fair," I complained. "I worked so hard for my bike and it's not even new. Then Liz gets a new bike. She didn't have to do anything for it. " My dad smiled. "She didn't have to do anything for it because it' s not really for her," he said. What did that mean? I didn't want her bike. By spring Liz and I were riding all over town together now that she could keep up. As we grew, Liz and I became true friends. Still I wasn't smart enough to figure out what my dad meant until years later. That new bike was not a gift for Liz -- it was a gift for me. He'd given me the gift of my sister's company, the ability to stay together rather than drift apart in the face of my ability to travel. He gave me my best friend. The author finally realized that _ . A) the new bike actually belonged to him B) the new bike wasn't bought by his father C) his father actually gave him a more valuable gift D) his father loved his sister more as a matter of fact
A: C
*Question*
YUZHOU, HENAN -An accident in a central China coal mine killed 21 miners Saturday and left another 16 trapped underground , the government said. The death rose to 26 Sunday morning as rescuers were battling to reach the 11 miners who were still trapped underground, rescue headquarters said. Rescuers were battling to reach the 11 miners still trapped underground, but chances for them to survive were very slim, said Du Bo, deputy chief of the rescue headquarters. "Based upon past experience, the remaining 11 miners could be buried in coal dust, so the survival chances are frail," Du said. More than 2,500 tons of coal dust smothered the pit after the gas leak , which hampered the rescue, said Du. The gas outburst happened at 6:03 a.m. Saturday when 276 miners were working underground in the mine in Yuzhou City. A total of 239 workers escaped but 21 were found dead and 16 trapped. An initial investigation showed that 173,500 cubic meters of gas leaked out in the accident. Liu Wenbin, a deputy chief engineer of the company that owns the mine, was in the pit when the accident happened. He organized the escape. "At around 6 a.m., I felt there was something wrong with the airflow in the shaft, and one of the team captains told me he also felt it and had already reported the problem," said Liu The mine is owned by Pingyu Coal & Electric Co. Ltd., a company jointly established by four investors, including Zhong Ping Energy Chemical Group and China Power Investment Corp. From this passage we know that _ . A) Of the 276 miners in the mine only 21 were dead until the next morning B) The miners trapped underground would be saved without difficulty C) 16 miners trapped underground were still found alive waiting for the rescue D) Until the next morning another 5 miners were found dead in this accident
**Answer**
D