M: Hey, Jane. What’s so interesting?
W: Hi, Tom. I’m reading this fascinating article on the societies of the Ice Age.
M: The Ice Age? There weren’t any societies then, just a group of people living in the cave.
W: That’s what people used to think. (1)_________________________. You may never hear of it.
M: Oh, really? In what ways?
W: Well, Ice Age people were the inventors of language, art, and music as we know it. And they didn’t live in caves, they built their own shelters.
M: What did they use to build them? The cold weather would have killed off most of the trees so they couldn’t have used wood. Of course they couldn’t live in the ice blocks.
W: In some of the warmer climates, they did build the houses of wood. (2)__________________________.
M: How did they stay warm? Animal skin walls don’t sound very sturdy(坚固的).
W: Well, it says here that in the early Ice Age, they often faced the house towards south to take the advantage of the sun, a primitive sort of solar heating.
M: Hey, that’s pretty smart. But when night comes, it is still a problem to keep warm.
W: They had some solution. (3)___________________________. They also have some creative ways to make their life better.
M: All these sound interesting. Can I read that magazine article after you’re done? I think I can use some of the knowledge for my recent paper.
W: Yes, sure.
