2013年中国将在天津举办第六届东亚运动会，假如你是天津市某中学高二年级三班学生李华，你班就东亚会将给天津带来的影响展开了激烈的讨论。请根据下表内容给<<21 世纪报>>的编辑写一封信，说说你们讨论的结果以及你个人的看法。
| 积极影响 | 消极影响 |
| 1.增加就业机会，促进旅游业的发展 | 1.交通拥挤 |
| 2.使市民响应低碳生活，增强环保意识 | 2.造成污染，破坏环境 |
| 3.让世界更了解中国，使天津更美丽 | 3.资源浪费 |
| …… | …… |
注意：
词数：不少于100字。
可适当加入细节，以使行文连贯。
信的开头和结尾已为你写好，不计入总词数。
参考词汇: 低碳low carbon
响应respond
Dear editor,
The 6th East Asian Games will be held in Tianjin in 2013. ___________________________
Sharks have lived in the oceans for over 450 million years, long before dinosaurs appears .There are now about 360 species of sharks, whose size ,behavior ,and other characteristics differ widely .
Sharks range in size from the 6-inch-long dwarf-dog shark to 60-foot-long whale shark—the world’s biggest fish. The whale sharks, like two other large shark species—the basking shark and the mega mouth shark---are harmless to people because they feed on plants and small aquatic（水生的）animal.
Every year ,we catch and kill over 100 million sharks, mostly for food and for their fins. Dried shark fins are used to make shark fin soup, which sells for as much as ＄50 a bowl in fine Hong Kong restaurants. Others sharks are killed for sport and out of fear. Sharks are volunterable （脆弱）to overfishing because it takes most species 10 to 15 years to begin reproducing and they produce only a few offspring.
While sharks are seen as people –eating monsters, they save human lives. In addition to providing people with food, they are helping us in cancer. They are among the few animals in the world that almost never get cancer. A research shows that chemicals extracted （提取）from shark cartiage（肋骨）have killed cancerous tumors in laboratory animals .Their highly effective immune system also allows wounds to heal quickly without becoming infected.
Sharks are needed in the world’s ocean ecosystems. Although they don’t need us ,we need them .We are much dangerous to sharks than they are to us .For every shark that bites a person, we kill one million sharks.
Sharks
| Origin of sharks | Sharks appeared 71 ,long before dinosaurs. |
| 72 | Dwarf-dog sharks are 73 . Whale sharks are 60 feet long. |
| 74 of being caught and killed | For food . For sport 75 |
| 76 | Sharks help us to 77 Sharks can heal quickly when 78 |
| 79 | Humans should protect sharks for the world’s ocean ecosystems Because we are 80 sharks. |