【正文】 ing with people in the distant past roughly 14,000 years ago. Over the years, the wolf became the talented domestic pet we know as the dog. There are plenty of theories, but the real reason why humans acquired dogs is still unknown. Was it because they needed to protect each other from harm? Was it a hunting partnership? Was it a need for panionship a type of friendship? Or was it a bination of the three? For 14,000 years the dog has played an important role in human societies. It39。s a partnership that39。s likely to continue for many years to e.WritingAnswer KeyA. Refer to summaries of each lesson in this unit.B. Besides dogs, human beings have a close bond with elephants especially in those tropical countries. Not like dogs, elephants are not kept as pets. They help to transport logs from the jungles. Because of their huge build, human beings can ride on them and go through the jungles and across the streams easily. Elephants can also be trained to perform in front of tourists which will bring these countries a large fortune. Unfortunately, in some developing countries, many elephants got hurt by the mines placed during the war and became disabled. So the government and some international societies are working together to help them.Unit 3 History DetectivesWarming UpAnswer Key1. Answers will vary, but should be supported by reasons to show that students have properly considered the questions. 2. Researchers learn about the past from written records and physical remains such as the ruins of buildings, equipment or personal possessions that have survived, and sometimes human bodies. 3. Possible answers: Egyptian, Mesopotamian, Greek, Roman, Aztec, and Incan. They are famous for their art and architecture, including their tombs.Listening3A Secrets of the PharaohsAnswer KeyBefore You ListenA. From top to bottom: tomb。 coffin。 mummy。 ArcheologistB. Theories include murder, an injury from war or a hunting accident, or an infection from a knee fracture.Listening ComprehensionA. 1. c 2. b 3. c 4. a 5. dB. From left to right: 5, 2, 3, 1, 4After You ListenA. 1. lived very luxurious lives 2. plex theory of life after death 3. treated with oil and spices, and covered in cloth to exclude any water 4. tests conducted by researchers 5. whether they had any injuriesB. 1. infected 2. analysis 3. murder 4. teenagers 5. attachmentC. 2. a) Tell students they may answer the question based on their knowledge. b) Answers will vary, but should be based on the students39。 own understanding.ScriptWas King Tut Murdered?King Tutankhamun was just a teenager when he died. He was the last king of a powerful family that had ruled Egypt for centuries. When he died in 1322 ., Tut (as Tutankhamun is often known today) was placed in a luxurious, goldfilled tomb. There he lay forgotten until the tomb39。s eventual discovery in 1922. Although we now know a lot about his life, the reason for Tutankhamun39。s death at such a young age has remained a mystery, with murder the most extreme possibility. Now, improved Xray technology is offering new clues into King Tut39。s death.Discovered and DamagedThe British archeologist Howard Carter opened Tut39。s tomb in 1922. Although it had been robbed in ancient times, it was still full of gold and other amazing items. Carter spent months carefully recording the treasures. When he and his team then attempted to remove King Tut39。s mummy, they found that it had bee attached to its solid gold coffin. Unfortunately, they did a great deal of damage to the mummy while removing it. Theories About Tut39。s Death In 1968, archeologists conducted an examination of the mummy using simple xray technology. Three important discoveries led to various theories about his death. The Xrays showed that bones in King Tut39。s chest were missing. Carter hadn39。t done that damage. Tut was a trained fighter and hunter, so some people have guessed that it was caused by a war injury or a hunting accident. There appeared to be pieces of bone inside the skull, causing many to believe that King Tut was killed by a blow from behind to the head. Was he murdered by people wanting to take control of Egypt? A serious fracture discovered above Tut39。s left knee could have been the result of an accident or attack. Infection might have started there and killed the boy king.A Closer Look at the Mummy In recent years, scientists, under the direction of Zahi Hawass, head of Egypt39。s Supreme Council of Antiquities, have applied a new and more effective Xray technology to mummies throughout Egypt. In the images, each bone appears in perfect detail. So, was King Tut39。s death murder or accident, infection or war injury? Doctors who analyzed the Xray images say that the skull was mainly undamaged, excluding the possibility of a blow to the head. However, while modern technology has been able to rule out one theory, the actual cause of death remains unknown. It seems there are secrets that even the latest technology cannot yet find the answers to.A. Multiple Choice. Question 1. How does the passage answer the question, Was King Tut murdered? Question 2. Which of the following has NOT been suggested as a reason for King Tut39。s death? Question 3. How was the mummy of King Tut damaged? Question 4. What was the problem with King Tut39。s chest? Question 5. Why does the actual cause of King Tut39。s death remain unknown?ScriptThe pharaohs of ancient Egypt lived very luxurious lives, and it seems that they wanted to take their treasure into the next life, too, because their tombs were filled with beautiful items of gold. In the ancient Egyptians39。 plex theory of life after death, their body had to last a very long time. This is the reason for mummies. In the mummification process the liquid was removed from the body, which was then treated with oil and spices, and covered in cloth to exclude any water mummies must be