【正文】 它們似乎會選擇性的咬食須鯨的舌頭。甚至會利用漲潮沖到海岸邊，捕捉來不及逃走的海豹、企鵝。如果群體中有成員受傷，或者發(fā)生意外失去了知覺，其他成員就會前來幫助，用身體或頭部連頂帶托，使其能夠繼續(xù)漂浮在海面上，就是在睡覺時也扎成一堆，這是為了互相照 應，并保持一定程度的清醒。偶爾會集體擱淺，群體有時會被困在潮池或海灣中。 習性 虎鯨時常會有躍身擊浪、浮窺等行為，或是以尾鰭或胸鰭拍擊水面。在海灣的淺水地帶，它還喜歡用尾巴去鉤拉海藻，發(fā)出 “ 呼呼 ”的聲音，不久，渾身就披滿了半透明的海草。頭部呈圓錐狀，沒有突出的嘴喙。s movements tends to follow those of their intended prey which， depending on location， may include salmon herring， baleen whales， penguins and seals. Status In Canada， killer whales are listed as threatened by the Committee on the Status of Endangered Wildlife(COSEWIC)and are protected under the new federal Species at Risk Act(SARA)． Other populations worldwide may be protected under specific national legislation. Threats to the Species Although the global population of killer whales is not endangered， different regional populations are and transient populations off the coast of Vancouver， Canada and Washington State， .， were depleted by the live capture fishery for aquaria that occurred before scientists knew how many killer whales existed in the these populations number only a few hundred whales and are threatened by pollution， heavy ship traffic， and possibly reduced of the killer whales39。t helped the whalers， I could have fled out to sea to enjoy my rest life. In the name of James I am James， a live on the southeastern coast of the beginning of the 20th century， I was saved by Old Tom， a killer whale. Believe it or not， the killer whales can not only help us hunt but also save people when they are in day， Old Tom found a baleen whale nearby， it quickly threw itself out of the water and crashed down soon as we saw this and headed out to the hunt， it swam by the boat， showing us the the killers work as a team—a pack of about six of threw themselves on top of the baleen whale39。s lips and they just want to share it with the whalers in return for their cooperation. 2． According to the text， as far as I am concerned， an anecdote must be an exciting or amazing story. Step 7 Consolidation Ask students to retell the passage with the help of their worksheet. 1． Please retell either of the two anecdotes in the name of Old Tom， the baleen whale or anecdote should at least consist of two paragraphs： Paragraph one： about the writer， time， place and what happened Paragraph two： detailed information about the anecdote For reference： In the name of Old Tom I am Old Tom， a killer live in the southeastern ocean of as I am，I never harm or attack ， I always help the whalers catch baleen the beginning of the 20th century， it was I and my panions who assisted the whalers in hunting a huge baleen later， I did save James from being drowned. On that day， when I found a baleen whale nearby， I quickly threw myself out of the water and crashed down soon as they saw this and headed out to the hunt， I swam by the boat，showing them the we work as a team—a pack of about six of us threw ourselves on top of the whale39。s another， the whalers called it Old Tom， just as they were calling a is to say， the whalers treated it as their dear the meantime， the killer itself must be very friendly to the whalers and helped them a lot in hunting in the return， the killer can get part of the baleen whale as its to some extent， the whalers and killers are depending on each cooperated well and lived in harmony with one another. 2． I like killer whales because when James fell off the boat， the killer whale not only protected him from being drowned but also wouldn39。...I could see a whale being attacked by a pack of about six other killers. t_let_the shark near. (2)Old Tom firmly held James up in the water. 2． Reading aloud and underlining expressions. Students read the text aloud to the tape and underline all the expressions in the them down into their notebooks after class as homework. Suggested answers： Collections： at the time， witness one39。s blow－h(huán)ole to_stop it breathing； some others are stopping it fleeing_out to sea. The killers started racing_between the whalers39。The killer whales helped the whalers catch a baleen whale. Step 3 Skimming 1． Glance through the two anecdotes and use one sentence to get the main idea of each anecdote. Main ideas： Anecdote one： The killer whales helped the whalers to catch a baleen w