1. Unit2 Crossing Limits Warming-up & Listening

2. The map of the world How many continents are there in the world ? What are their names?

3. Asia Africa Europe North America South America Oceania Antarctica Asian African European American Oceanian Antarctic

4. Zheng He Christopher Columbus James Cook Abel Tasman

5. Zheng He a navigator between ( 1405—1433 ), made 7 voyages to The Indian Ocean, visited 30 countries and regions, the Red Sea

6. Christopher Columbus A Spanish explorer, completed 4 voyages to the west and reached North America,but at that time he insisted until he died that the land he reached was an unknown part of Asia

7. James Cook An explorer, to explore the Pacific Ocean, 3 voyages around the world, visited hundreds of islands, including Australia, New Zealand, Hawaii and North America, made maps of them

8. Abel Tasman The discovery of New Zealand Abel Tasman Holland 1603 – 1659 The first European to discover New Zealand

9. dangers and challenges in exploration hit a rock, meet with storms, Winds and waves on the sea, losing their way, fight against the natives, lack of food and drinking water, pirates( 海盗 )...

10. Listening

11. Answers to exercise 2 past present Communication Transport Discoveries weren’t published until at least a year later Horse and camels; people carry all supplies; no roads and no maps; dangerous and difficult; tiny ships mobile phones; Internet Cars and trucks to carry all supplies; aeroplanes and helicopters; fast and safe

12. 3. Listen to the tape and answer the following questions. 1.What were some of the risks that explorers had to face in the past? 2. How do modern explores deal with the problem of having no maps? 3. In which way will a human trip to Mars be similar to the trips of explorers in the past? Losing the way, running out of supplies, hurt by poisonous snakes, dangerous animals, terrible diseases, or even eaten by people. They would use telescopes, aeroplanes or helicopters to survey the area, asking other scientists for help using mobile phones and the Internet. Explorers must take enough food, drink and medicine for the trip. There will be no roads and no maps, and there may be unknown dangers.

13. speaking

14. 1.In their work, scientists meet with situations about which they have to make decisions. meet with…,come across… come up with…, run into… 遇到, 碰上 make decisions about…. 对 … 作出决定 about which … 在句中引导一带有介词 的定语从句, 修饰先行词 situations

15. 2.When Captain James Cook landed in …,he took possession of it in the name of the British Crown..1) sb take/get/gain possession of… 把 … 占为己有, 占领, 夺取 sb be in possession of sth Don’t take possession of the wallet,though you picked it up in the street. 2) sth be in the possession of sb （某物）为（某 人）所 有 The rare stamp is in the possession of an unknown collector. in charge of / in the charge of

16. ① You can’t ___it, which belongs to her. A.take the possession of B. take possession of C.take charge of D. take the place of B 2.in the name of … 以 … 名义, 代表 …, 看在 … 上 The police arrested him in the name of the law. In the name of love, stop it.

17. Let me thank you in the name of us all. 让我代表大家感谢你. in name only by ／ of/under the name of, call one’s names name after 只在名义上 Eg. The boy ____ the name of David is named ____ his grandfather. A. in; after B. by; with C. in; by D. by; after D 名叫 …… 的 骂人 以．．．．命名

18. 1 ． masses of 大量的 a mass of sand/snow 一堆 / 团 / 块 2. be rich/poor in 富含 / 缺乏 More Phrases: 1 ． do research on 进行调查 2. a state key project 一项国家重点项目 3. dig up 挖掘 1. risk one’s life/health to do sth 冒丧失生命，健康之险做某事 2. do observations for… 为 … 去做观察

19. 3.Instead of sending people, we can send robots equipped with…. instead of … 代替, 而不是 e.g. Instead of going to the museum, they finally decided to go to the park. equipped with… “ 装备 ”, 过去分词短语作定语 equip… with…., be equipped with…. e.g. All the police are equipped with guns and bullets. equipment n. 设备, 配置

20. The end