Fill in the blanks with the words given below. Change the forms where necessary. 1) The lower the price, the greater the demand. This is because people who want the __________ will buy more of it at a lower price. 2) The offer of a free car stereo _________ her into buying a new car. 3) When spending on consumer goods rises faster than the nation’s ability to produce them, prices ______ to go up. 4) When Ralph was still a teenager, he __________ newspapers on a bicycle. 5) The bad weather ___________ problems for many farmers. 6) Libraries today face many _________ problems and some of them cannot even buy the books readers need. 7) The restaurant __________ us $10 for the tea. It’s really not worth it. 8) There are two main _________ parties in the United States — the Democratic Party(民主党) and the Republican Party(共和党). 9) The food _______ is the total amount of food available to all the people in the world. 10) When chemical waste is leaked into a river, the pollution may kill the fish in it and _________ other valuable natural resources. 11) We can tell a nation’s ___________ condition by looking at its GDP(国内生产总值) over a period of years. 12) Traveling by plane is expensive because they usually carry only about 100 people but ___________ large amounts of fuel. 13) You’d better ______ your bags. We’re leaving in an hour. 14) We believe that price will be a major _______ in the success of this new product.