2. Unit 1 The world of our senses

3. Shark attacks Two thriller films about shark attacks

4. What do you know about sharks? Sharks are fish that live in oceans around the world. They have no bones but cartilage ( 软骨 ), which is not as hard as the bone. Most sharks are around 2 meters long, but some can be as long as 15 meters. The largest shark is the whale shark, which can exceed 40 feet. The most dangerous shark is the great white shark.

5. Whale shark 鲸鲨 Bull shark 公牛鲨 Great white shark 大白鲨 / 噬人鲨 Tiger shark 虎鲨 Shark Species

6. Fast reading 1.How many different types of sharks are there in the ocean? 2.Do all of them attack humans? 3. What are their unique senses? 4. What advice people can follow to avoid being attacked by sharks? 5. What tips can we try if a shark attacks us? Questions:

7. Answers to the questions 1. How many different types of sharks are there in the ocean? 2. Do all of them attack humans? 3. What are their unique senses? nearly 400 No, only 30 types. They can see in the dark, smell blood over a long distance, and be attracted to colors and shiny objects.

8. 4. What advice people can follow to avoid being attacked by sharks? 5. What tips can we try if a shark attacks us? Don’t swim in the dark; Don’t swim when people have fresh wound; Don’t wear bright clothing and jewellery. Don’t panic. Hit the shark on the nose. Stick our finger in the shark’s eye.

9. Careful reading Listen to the tape, read the text again and try to find out the main idea of each paragraph.

10. Para.1(1-10): There are nearly 400 types of sharks. Para. 2(11-18): Sharks do not feed on humans. Para. 3(19-33): There are three types of shark attacks. Para. 4(34-50): The chances of being attacked by a shark can be reduced if people follow some advice. Para. 5(51-59): There are three tips on what to do if a shark attacks. Para. 6(61-63): Do not be frightened by sharks.

11. Notes on the difficult sentences 1. The chances of being attacked by a shark are very small compared to other dangers. 相对于其它危险而言，人类遭受鲨鱼攻 击的几率其实是很小的。

12. 2. Many more people drown in the ocean every year than are bitten by attacks. 每年溺海的人数比遭到鲨鱼咬噬的人数多得多。 drown vi. 淹死，溺死 Do cats drown easily? drowning 快要淹死的 drowned 淹死的 Be careful when crossing the bridge or you will fall into the water and get__________ (drown). drowned

13. 3. The low number of attacks that happen every year proves that sharks do not feed on humans if they have the choice. 鲨鱼攻击人类的事件每年并不多见，这 就证明，如果有选择，鲨鱼并不以人为 食。

14. 4. The latter two types of attack are more likely to be deadly for humans. 后两种攻击方式对人类来说更可能致命。 可能性： likely( 主语可以是人 / 物 /it) possible( 主语是 it, 可能性较小） probable( 主语是 it, 可能性较大）

15. 常用句型： Sb/sth is likely to do…… It is likely/possible/probable that… It is possible for sb to do …… 考点例题 ： 1.Is he ____ to win? 他有可能获胜吗？ 2.It is ____________, though not probable, that he will come tomorrow. 他明天可能来，但也不一定 准来。 3.It is ________ that he went there! 他很可能去那儿 了！ 4.This way makes it ________ for you to catch up with others. 这种方法有可能使你赶上别人。 likely likely/possible probable possible

16. 7. Don’t be frightened by sharks as there is 30 times greater chance of being hit by lightning than being attacked by a shark. 不要惧怕鲨鱼，因为人类被闪电击中的几率 要比遭受鲨鱼攻击的几率大 30 倍。 e.g. Five times more people came than expected.( 倍数 + 比较级） He bought twice as many books as I. （倍数 + as…as 结构） This house is twice the height of the one there. （倍 数 + the size, height, length, width…of…)

17. e.g. 中国的国土面积比英国的大约大 39 倍。 ① The area of china is about 39 times larger than that of the UK. ( 倍数 + 比较级 ) ② China is about 40 times as big as the UK. （倍数 + as…as 结构） ③ China is about 40 times the size of the UK. （倍数 + the size, height, length, width…of…)

18. 1 ． What a table! I've never seen such a thing before. It is ______it is long.[2005 湖北 ] A ． half not as wide as B ． wide not as half as C ． not half as wide as D ． as wide as not half C 连线高考

19. 2 ． It is reported that the United States uses _______ energy as the whole of Europe. [2005 全国卷ⅳ ] A ． as twice B ． twice much C ． twice much D ． twice as much D

20. Discussion Read the text again and find out what unique senses sharks have, what senses sharks use to attack humans and what people can do to protect themselves.

21. Homework 1.Do Part B,D on page 91,93 in Workbook. 2.Review words and phrases in this unit.

22. Thank you!