1、Listening, Speaking and Reading,1. Listen to the tape and fill the layers in the “wastepaper basket” diagram below.,yogurt pots,orange skin,wastepaper,used envelopes,Answer key for Exercise 2,Each layer looks different as they are uncovered, so you can tell where one layer starts and another finishe
2、s. In the wastepaper basket, the most recent layer is _, an older layer is below that and the oldest layer is _.,at the top,at the bottom,All living things have _ in their bodies. When they die, the carbon _ at a _ rate. The method measures _ of carbon in bones or plants using radioactivity and can
3、_ how old the remains are.,starts to disappear,fixed,the amount,work out,carbon,Note: The age of the building depends on the number of layers it is resting on. The more layers, the more recent the building.,Answer key for Exercise 3:,The oldest building is B because it has no layers underneath it. T
4、he second oldest building is C because it has one layer underneath it. The most recent building is building A. It has two layers underneath.,Answer the following questions after reading the text: 1. Which jobs did Dahu do? 2. Which jobs did Lala do? 3. Who works cooperatively and who does tasks alon
5、e? 4. Who does the most dangerous tasks? 5. Where does the danger come from?,Reading and speaking,Sample answers to above questions:,1. catch fish, repair stone tools, make scrapers and axe-heads.2. collect fruit and nuts, prepare food.,3. Both men and women work cooperatively. For example, Lalas mo
6、ther and aunts were preparing the meat of deer and pig over the fire. Men do tasks alone.4. Men do the most dangerous tasks. 5. The danger comes from the wild animals.,Answer key for Exercise 2,1. Making and repairing tools,2. Fishing,3. Cutting down trees,4. Hunting animals,5. Protecting the group
7、from harm,1. Collecting nuts, fruit and water,2. Cutting up meat and fish for cooking,3. Preparing skins to make clothes,4. Preparing food,5. Looking after children,Answer key for Exercise 3,Mens tasks: patient (tool making), dangerous (hunting), some individual (tool making and repairing) and some
8、co-operative (hunting), skilful (tool making), protective (of group),Womens tasks: affectionate (to group), co-operative (cooking), caring (providing food), patient (collecting food), skilful (cooking), individual (collecting nuts and fruit),Co-operative tasks: Individual tasks: Most dangerous tasks
9、:,men hunting animals; women doing cooking and preparing food men making or repairing tools; women collecting fruit and nuts men hunting animals,Answer key for Exercise 4,Where the danger comes from: Sharing of tasks:,men and women had clearly divided tasks: fire and collecting nuts needed to be done every day but killing animals would,wild animals living near the caves,only be done now and then. So the womens tasks were continuous and the mens tasks were more periodic.,Finish the Exs. in Best English on Page 74-75,Homework,
