Early Native American groups lived in different cultural areas. Their environments had resources. Each group made particular products or developed certain skills, besed on their own As they perfected their skills, exciting began to happen. For the first time in their history, they had more things than they

They wouldn’t let their products go to , of course. When Native American groups began to communicate with each other, they began to things they wanted or needed. The they traded goods and services without using any form of money was called bartering. Thanks to bartering, people began to enjoy a better of life. To barter with others meant that work became much . No one group had to work as hard to make or find everything they needed for survival.

Native American groups would often travel long distances for the chance to with each other. In between trading times, they would or collect extra products. They kept them especially for the purpose of bartering with other native groups at their trade meetings.

Another of trading between cultural areas was that people could enjoy products that were to make with the resources in their own . For example, people from the Desert Southwest area tools made from whalebone(鯨須). There was no whalebone available in the . However they could get it from the natives living in the Pacific Northwest area.

Some people use bartering today to get things the need. You might to do the dishes for your brother if he will take you to the movies. Especially in hard economic people return to this way of getting things they need.

1.A．strange B．ordinary C．similar D．different

2.A．skills B．interests C．resources D．customs

3.A．everything B．something C．a(chǎn)nything D．nothing

4.A．found B．collected C．needed D．sold

5.A．market B．town C．waste D．charity

6.A．buy B．share C．produce D．save

7.A．way B．idea C．plan D．study

8.A．variety B．habit C．quantity D．quality

9.A．harder B．dirtier C．easier D．nicer

10.A．greet B．trade C．work D．play

11.A．use B．create C．send D．a(chǎn)dvertise

12.A．choice B．trouble C．benefit D．pleasure

13.A．illegal B．necessary C．impossible D．natural

14.A．desert B．trade C．group D．a(chǎn)rea

15.A．designed B．wanted C．discovered D．invented

16.A．water B．sea C．desert D．1and

17.A．yet B．still C．even D．never

18.A．fear B．earn C．offer D．refuse

19.A．development B．generation C．disadvantage D．times

20.A．a(chǎn)ge-old B．world-famous C．new-born D．ready-made

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