Unusual incidents are being reported across the Arctic. Inuit families going off on snowmobiles to prepare their summer hunting camps have found themselves cut off from home by a sea of mud. There are also reports of sea ice breaking up earlier than usual, carrying seals beyond the reach of hunters. Climate change may still be a rather abstract idea to most of us, but in the Arctic it is already having great effect--if summertime ice continues to shrink at its present rate, the Arctic Ocean could soon become almost ice-free in summer. The knock-on effects are likely to include more warming, cloudier skies and higher sea levels. Scientists are increasingly eager to find out what's going on in the Arctic. For the Inuit the problem is urgent. They live in unsteady balance with one of the toughest environments on earth. Climate change, whatever its causes, is a direct danger to their way of life. Nobody knows the Arctic as well as the locals, which is why they are not content simply to stand back and let outsider experts tell them what's happening. In Canada, where the Inuit people are trying hard to guard their hard-won autonomy in the country's newest land, Nunavut, they believe their best hope of survival in this changing environment lies in combining their ancestral knowledge with the best of modern science. This is a challenge in itself. The Canadian Arctic is a vast, treeless polar desert that's covered with snow for most of the year. Adventure into this area and you get some idea of the hardships facing anyone who calls this home. Farming is out of the question and nature offers few pickings. Humans first settled in the Arctic a mere 4,500 years ago, surviving by taking advantage of sea first. The environment tested them to the limits: sometimes the settlers were successful; sometimes they failed and disappeared. But around a thousand years ago, one group appeared that was uniquely well adapted to deal with the Arctic environment. These Thule people moved in from Alaska, bringing dogs, iron tools and the... Which of the following is likely to be the effect of climate change? A) Shorter and shorter summertime. B) Ice-free summer around the Arctic. C) Lower sea levels. D) More rainy skies.
B
Four students are talking about the future after class. Deng Yu: In 2050, China will be richer than it is now. Beijing will be getting ready for the 40thOlympic Games in 2050. We will see the blue and clear sky and smell the fresh air. There will be more pandas living happily in China. I believe that 2050 will be the year of China. Liu Yan: A holiday to the moon will no longer be a dream. We can also travel far to other planets and talk with spacemen. We might also eat something like pills instead of today's meals. Everyone will enjoy a longer life. Sun Wei: Robots will be more popular. They will do what people don't want to do. We'll build new homes on other planets. By then, I'll be sixty years old. Zhang Lan: By the year of 2050, cloning will have been used in many ways. It will bring back animals which disappeared many years ago. There will be no pollution. The whole world will be one big family. There will be no wars. We'll live a much easier and better life. _ thinks that people can spend their holidays on the moon in the future. A) Deng Yu B) Zhang Lan C) Sun Wei D) Liu Yan
D
Q: Many parents worry that their children's eating habits may not be good enough to stay healthy. Some children ask for the same food over and over again, some may refuse to try anything new, and some may keep asking for snacks . Therefore, having healthy eating habits becomes one of the most important lessons a child needs to learn. Most parents struggle with managing good eating habits and nutrition for their children. Parents should make a plan for their children's nutritional needs. Start your child's day with a good breakfast. Breakfast is necessary to provide the nutrition for an active day. Studies show that children do better in study when they begin a day with a good breakfast. Allow your child to help you plan and prepare a meal. He will be glad to eat foods that he has helped to put on the table. The mealtime environment has a lot to do with how your child will feel about food. Try to serve your meals at the same place at the same time of a day. Keep the meal itself as the main event and leave the toys and television for later use. Snacks are also important. We can give our body and brain energy by eating snacks between meals. Children are often hungriest in the afternoon after school and in the evening. Offer snacks at regular time between meals. This way, your child won't refuse a meal because he knows a snack is soon to follow. More importantly, when offering snacks, you should be careful with what to choose. To help their children form healthy eating habits, parents _ . A) should encourage their children to eat more often at school B) can ask the children to help with meal planning and preparation C) must make the mealtime environment as quiet as possible D) should serve some snacks while having a meal
A: B
*Question*
In the earliest stages of man's development he had no more need of money than animals have. He was content with very simple forms of shelter, made his own rough tools and weapons and could provide food and clothing for himself and his family from natural materials around him. As he became more civilized, however, he began to want better shelter, more efficient tools and weapons, and more comfortable and more lasting clothing than could be provided by his own neighborhood or by the work of his own unskilled hands. For these things he had to turn to the skilled people such as smiths, leather workers or carpenters. It was then that the question of payment arose. At first he got what he wanted by a simple process of exchange. The smith who had not the time to look after land or cattle was glad to take meat or grain from the farmer in exchange for an axe or a plough . But as more and more goods which had no fixed exchange value came on the market, exchange became too complicated to be satisfactory. Another problem arose when those who made things wanted to get stocks of wood or leather, or iron, but had nothing to offer in exchange until their finished goods were ready. Thus the difficulties of exchange led by degree to the invention of money. In some countries easily handled things like seeds or shells were given a certain value and farmer, instead of paying the smith for a new axe by giving him some meat or grain, gave him so many shells. If the smith had any shells left when he had bought his food, he could get stocks of the raw materials of his trade. In some countries quite large things such as cows or camels or even big flat stones were used for trade. Later, pieces of metal, bearing values according to the rarity of the metal and the size of the pieces, or coins were used. Money as we know it had arrived. Money was not used until _ . A) paper was invented B) nothing could be offered in exchange C) people practiced a simple process of exchange D) the exchange of one thing for another became too complicated
**Answer**
D