Ex. 3. Put the verb in the proper form.

1. Since the beginning of the 20th century new entrepreneurial ideas and technologies (to develop).

2. Money (to invent) to make it easier for people to exchange.

3. Businesses (to encourage) teams of workers to search for better and more efficient methods.

4. These workers (to minimize) costly inventories, and they (to develop) highly efficient retail stores.

5. When money (to use) in exchange, each product or resource has a single money price.

6. Economic security means that their needs should (to meet).

7. If people want to buy more gasoline at a certain price it means that the demand (to increase).

8. In a barter system a product would have as many different prices as there are other products that could (to change) for it.

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