2. 外语
  3. Let’s look back in history to an earlier way of life. At one time, people didn’t use money to get the things they need from

Let’s look back in history to an earlier way of life. At one time, people didn’t use money to get the things they need from

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问题     Let’s look back in history to an earlier way of life. At one
time, people didn’t use money to get the things they need from                  S1.______
their physical environment. We can say that people used to
live off the land same way wild animals do. If people wanted                    S2.______
food, they could hunt animals or gather plants. If they couldn’t
catch food, they would die. That was all there were to it.                      S3.______
There was no need to place a value on certain objects and decide
what things were worthy in relation to each other If you were                   S4.______
hungry, then food was the most valuable thing. If you were
cold, then a warm place was the most important thing
    Back in those primitive times it was necessary to have a                    S5.______
special form of exchange value for everything like a price. In
those times when the only things that were really valuable                      S6.______
were the skills to survive. But as society became more
complex people depended most on others who were living far                      S7.______
away and then it became important for people to develop some
method for exchanging value without having to exchange the
actual goods
    This need to develop a method for exchanging value was                      S8.______
led to the use of money. Money was a meaning of exchanging                      S9.______
value without having actually exchanged the specific things you
wanted. Before the use of money, people had to trade
things for each other, and it was usually very difficult to                     S10.______
decide the comparative value of an item. With the intro-
duction of money all things could begin to have a common
value that everybody could know about.
选项
答案need→needed
解析 时态错误。第一句的look back和本句句首的At one time表明句子应该使用过去时态，那么修饰the things的定语从句也应该用过去时，所以要把need改为needed。
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