首字母训练.doc

首字母训练1.According to many experts, bull sharks (鲨鱼) are the most dangerous sharks in the world. This is b_1_ they are an aggressive species of shark and they tend to hunt in waters where people often swim, along tropical (热带的) shorelines. Bull sharks live all over the world, in warm, shallow ocean waters. They are e_2_ known to swim in freshwater rivers.Humans are not part of a bull sharks n_3_ prey (猎物). Scientists think that when a bull shark g_4_ after a person it is because the big fish is curious or because it simply mistakes a person for prey. Bull sharks will eat almost anything, but their diet consists m_5_ of fish. They also sometimes eat dolphins, sea turtles, or even other sharks. Before they attack the preys, bull sharks head-butt (用头撞) the animals. This head-butting habit, along with its short, blunt snout (口鼻部), led to it being named bull shark.Sharks must keep salt in their bodies to s_6_ and most can live only in salt water. However, bull sharks have developed special adaptations that help them keep salt in their bodies even when they are in fresh water. Scientists are still studying these sharks to figure out why and how they developed this unusual a_7_.Bull sharks are not on the endangered species list. Thus, people fish for bull sharks for food, for their hides (皮), and for oil. Researchers believe that their populations may be shrinking fast.答案：1.because 2. even 3. normal 4. goes 5.mainly 6.survive 7. ability首字母训练2. Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be a_1_ that your sport of choice might have great influence on the environment. Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of c_2_ and huge amounts of energy are used to keep its courses (球场) in good c_3_. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often c_4_ responsible for serious water shortage in some local areas.There are many environment-friendly sports. Power walking is one of them that you could t _5_ up today. You dont need any special equipment except a good pair of shoes; and you dont have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking d_6_ can make you feel less anxious, sleep well and have better weight control.Whatever sport you take up, you can m_7_ it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be green gyms. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, its free.答案：1. aware 2.chemicals 3. condition 4.considered 5. take 6. daily 7.make首字母训练3. People who have lost the ability to understand or use words due to brain damage are called aphasics (失语症患者). Such patients can be e_1_ good at something else. From the changing expressions on speakers faces and the tones of their voices, they can tell lies f_2_ truths.Doctors studying the human brain have given a number of examples of this a_3_ power of aphasics. Some have even c_4_ this power to that of a dog with an ability to find out the drugs hidden in the baggage.Recently, scientists carried out t_5_ see if all that was said about aphasics was true. They studied a mixed group of people. Some were normal; others were aphasics. It was proved that the aphasics were far ahead of the normal people in recognizing false speeches in most cases, the normal people were fooled by words, but the aphasics were not.Some years ago, Dr. Oliver Sacks wrote in his book about his experiences with aphasics. He mentioned a particular case in a hospital. Some aphasics were watching the president giving a speech on TV. S_6_ the president had been an actor earlier, making a good speech was no problem for him. He was trying to put h_7_ feelings into every word of his speech. 答案：1. especially；extremely 2. from 3. amazing 4. compared 5. tests 6. since 7. his 首字母训练4. Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing? Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk about i_1_ both enjoy, such as pop culture, he remembers his more distant relationship with his parents w_2_ he was a teenager.“I would never have said to my mom, Hey, the new Weezer album is really great. How do you like it?” says Ballmer. “There was just a complete gap in t_3_.”Music was not the only thing. From clothing and hairstyles to activities and expectations, earlier generations of parents and children often appeared to move in separate orbits.Today, the generation gap(代沟) has not d_4_ but it is getting narrow in many families. C_5_ on subjects such as sex and drugs would not have taken place a generation ago. Now they are comfortable and common. And parentchild activities, from shopping to sports, involve a feeling of trust and friendship that can continue into adulthood.No wonder greeting cards today carry the message, “To my mother, my best friend.”But family e_6_ warn that the new equality can also result in less respect for parents. “Theres still a lot of strictness and authority（权威） on the part of parents out there, but there is a change happening,” says Kerrie, a psychology professor at Lebanon Valley College. “In the middle of that change, there is a lot of confusion（困惑）among parents.” Family