# Study on dolphins` behaviour - 科目：雅思听力真题（Part 4） - 考频：中频 - 题目数：10 - 来源页：https://www.yaquan.site/paper/154a538c-3dda-4afd-affb-10f0a226fda5（在线机考练习与音频请访问该页面） - 数据更新：2026-10-29 ## 题目原文 00:00:01,240 Part four. 00:00:07,500 You are now going to hear a lecture about the behavior of dolphins. First, you have some time to look at questions thirty-one to forty. 00:00:41,160 Now listen and answer questions thirty-one to forty. 00:00:47,220 Okay. Today's lecture is about the behavior of dolphins. Dolphins are mammals closely related to whales and porpoises. There are almost forty species of dolphin, and they vary in size from one point two meters and ninety pounds up to nine and a half meters and ten tons. 00:01:06,720 They are found worldwide, mostly in shallower seas of the continental shelves, and they are carnivores, eating mostly fish and squid. 00:01:15,220 Dolphins are highly social animals, often living in pods of up to a dozen individuals, though pod sizes and structures vary greatly between species and locations. 00:01:25,320 In places with a high abundance of food, pods can merge temporarily, forming a super pod, which groupings may exceed a thousand dolphins. 00:01:33,940 Membership in pods is not rigid, with interchange being common. 00:01:39,140 Dolphins can, however, establish strong social bonds. They will stay with injured or ill individuals, even helping them to breathe and bringing them to the surface if needed. 00:01:49,540 This altruism does not appear to be limited to their own species. A male dolphin called Moko in New Zealand was observed guiding a female pygmy sperm whale together with her calf out of shallow water where they had been stranded several times. 00:02:03,420 Dolphins have also been seen protecting swimmers from sharks by swimming circles around the swimmers or charging the sharks to make them leave. 00:02:11,620 Dolphins also display culture, something long believed to be unique to humans and possibly other primate species. 00:02:18,840 In May two thousand and five, a discovery in Australia found Indo-Pacific bottlenose dolphins teaching their young to use tools. 00:02:27,740 They cover their snouts with sponges to protect them while foraging for food. 00:02:33,130 This knowledge is mostly transferred by mothers to daughters, unlike primates, where knowledge is generally passed on to both sexes. 00:02:42,080 Using sponges as mouth protection is a learned behavior. 00:02:46,500 Another learned behavior was discovered among river dolphins in Brazil, where some male dolphins use weeds and sticks as part of a sexual display. 00:02:55,920 Dolphins may also engage in acts of aggression towards each other. 00:02:59,960 The older a male dolphin is, the more likely his body is to be covered with bite scars. 00:03:05,740 Male dolphins engage in acts of aggression apparently for the same reasons as humans. That is, disputes between companions and competition for females. 00:03:15,360 Acts of aggression can become so intense that targeted dolphins sometimes go into exile after losing a fight. 00:03:22,780 Male bottlenose dolphins have also been known to engage in infanticide, which is the killing of their young. 00:03:29,460 Dolphins have also been known to kill porpoises for reasons which are not fully understood, as porpoises generally do not share the same diet as dolphins and are therefore not competitors for food supplies. 00:03:41,840 The main food of dolphins is fish and squid, and various methods of feeding exist among and within species, some apparently exclusive to a single population. 00:03:53,300 One common feeding method is herding, where a pod squeezes a school of fish into a small volume known as a bait ball. 00:04:01,060 Individual members then take turns plowing through the ball, feeding on the stunned fish. Corralling is a method where dolphins chase fish into shallow water to catch them more easily. Orcas and bottlenose dolphins have also been known to drive their prey onto a beach to feed on it, a behavior known as beach or strand feeding. 00:04:23,140 Some species also whack fish with their flukes, stunning them and sometimes knocking them out of the water. 00:04:30,560 When it comes to playful behavior, dolphins show various types, often including objects, self-made bubble rings, other dolphins, or other animals. When playing with objects or small animals, common behavior includes carrying the object or animal along using various parts of the body, passing it along to other members of the group, or, or taking it from another member or throwing it out of the water. 00:04:55,220 Dolphins have also been observed harassing animals in other ways. For example, by dragging birds underwater without showing any intent to eat them. Playful behavior that involves other animal species with active participation of the other animal can also be observed. Playful human interaction with dolphins being the most obvious example. However, playful interactions have been observed in the wild with a number of other species as well as humpback whales and dogs. 00:05:26,700 That is the end of part four. 00:05:30,140 You now have one minute to check your answers to part four. ## 题目与答案 ### 31. Background: ·found 31_____ Background: ·found 31_____ **答案**：worldwide 原文定位：Dolphins are mammals closely related to whales and porpoises. There are almost forty species of dolphin, and they vary in size from one point two meters and ninety pounds up to nine and a half meters and ten tons;They are found worldwide, mostly in shallower seas of the continental shelves, and they are carnivores, eating mostly fish and squid 同义替换：「worldwide」↔「all over the world」 ### 32. Socialising: ·very sociable and live in 32_____ Socialising: ·very sociable and live in 32_____ **答案**：pods 原文定位：Dolphins are highly social animals often living in pods of up to a dozen individuals, though pod sizes and structures vary greatly between species and locations 同义替换：「very sociable」↔「highly social」 ### 33. ·have been known to assist 33_____ ·have been known to assist 33_____ **答案**：swimmers 原文定位：Dolphins have also been seen protecting swimmers from sharks, by swimming circles around the swimmers or charging the sharks to make them leave 同义替换：「have been known to」↔「have also been seen」；「assist」↔「protecting」 ### 34. Culture: ·discovered in May 2005 that young bottle-nose dophins learn to utilise 34_____ Culture: ·discovered in May 2005 that young bottle-nose dophins learn to utilise 34_____ **答案**：tools 原文定位：In May two thousand and five, a discovery in Australia found Indo-Pacific bottlenose dolphins teaching their young to use tools 同义替换：「utilise」↔「use」；「learn」↔「be taught」 ### 35. · dolphin pass knowledge from mothers to daughters, whereas primates pass to both 35_____ . · dolphin pass knowledge from mothers to daughters, whereas primates pass to both 35_____ . **答案**：sexes 原文定位：This knowledge is mostly transferred by mothers to daughters, unlike primates, where knowledge is generally passed on to both sexes 同义替换：「pass」↔「transfer」；「whereas」↔「unlike」 ### 36. Aggression: ·like humans, this is due to disagreements over 36_____ and competition for females. Aggression: ·like humans, this is due to disagreements over 36_____ and competition for females. **答案**：companions 原文定位：Male dolphins engage in acts of aggression apparently for the same reasons as humans. That is disputes between companions and competition for females 同义替换：「like」↔「for the same reasons as」；「due to disagreements over」↔「disputes between」 ### 37. Food source: ·dolphins have a variety of feeding methods, some of which are 37_____ to one population. Food source: ·dolphins have a variety of feeding methods, some of which are 37_____ to one population. **答案**：exclusive 原文定位：various methods of feeding exist among and within species. Some apparently exclusive to a single population 同义替换：「one」↔「single」 ### 38. ·methods include: herding, coralling, 38_____ or strand feeding ·methods include: herding, coralling, 38_____ or strand feeding **答案**：beach 原文定位：Individual members then take turns plowing through the ball, feeding on the stunned fish. Corralling is a method where dolphins chase fish into shallow water to catch them more easily. Orcas and bottlenose dolphins have also been known to drive their prey onto a beach to feed on it, a behavior known as beach or strand feeding ### 39. Playing: ·common behavior with an object include: 39_____ it from another dolphin Playing: ·common behavior with an object include: 39_____ it from another dolphin **答案**：taking 原文定位：When playing with objects or small animals, common behavior includes carrying the object or animal along using various parts of the body, passing it along to other members of the group, or taking it from another member or throwing it out of the water ### 40. ·playful behavior may include other animal 40_____ such as humans ·playful behavior may include other animal 40_____ such as humans **答案**：species 原文定位：Playful behavior that involves other animal species with active participation of the other animal can also be observed. Playful human interaction with dolphins being the most obvious example 同义替换：「include」↔「involves」 --- 以上内容由鸭圈雅思真题库（www.yaquan.site）提供，收录近期雅思考试真题回忆，支持在线机考模式免费练习。