__1__

　　Some sharks live near the surface, some live deep in the water, and others on or near the ocean floor.

　　We tend to think of sharks as big dangerous creatures. We sometimes read about shark attacks in the newspapers, and in 1975 the film Jaws terrified moviegoers with the story of a great white shark which attacked holiday－makers in a small seaside town in the USA. __2__(切断) a man's leg in a single bite.__3__

　　There are almost 400 species of sharks and more than half of these are under a metre in length.

　　The biggest sharks of all are not at all dangerous to humans. The basking shark and the whale shark grow to around 12 metres, but they are quite harmless.

　　__4__

　　Of these the bull shark is the one that is most likely to attack people.

　　It swims in very shallow waters where people swim. __5__

　　Indeed you are far more likely to be killed by a dog or by bees than by a shark, and some scientists believe that sharks only attack people because they mistake them for their favourite food.

　　A. The pigmy shark, for example, is only about 20 centimetres in length.

　　B. Less than one hundred people are attacked by sharks each year.

　　C. A shark is a large fish considered to be dangerous to humans.

　　D. Only about 25 species(种类) are dangerous to people.nly a fearsome creature.

【2016届高三英语一轮复习课时训练：4 Cyberspace(北师大版)】相关文章：

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修7 unit1《Living well》

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（11）及答案

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修4 Unit 1 Women of achievement

★ 2014届高考英语一轮复习必修3参考答案（外研版）

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修3 Unit 4 Astronomy：the science of the stars

★ 2017届高考英语二轮复习大题冲关秘籍短文改错：体验真题（含解析）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（3）及答案

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit5《Canada》

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（15）及答案

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (47)