A To prevent the overuse of the car． B To make sure that the car won' t be damaged． C To make sure the user return the car and pay for using it． D To ensure that the car is safely and timely returned．<br/>

A They can choose not to pay for their purchases． B They can easily borrow money at a lower interest． C They can own something before they actually pay for it． D They can pay only a small amount of what they owe．<br/>

A Credit—a Way of Life in America B Credit Services in America C Convenience of Living in America D History of Credit Cards in America<br/>

A He was deeply impressed by the Columbian Exposition． B He realized that it was possible for chocolate to become popular． C There was nothing to produce in his factory in Lancaster． D He was interested in the chocolate machinery displayed at the fair．

A The adding of new materials． B The demand in the army during WWI． C The purchase of new machines． D The appearance of smaller candy bars．<br/>

A Focus． B Position． C Chair． D Center．<br/>

A A World Fair held in Chicago in 1893． B The popularity of the American candy bar industry． C The candy bar industry during World War I ． D The spread of the candy bar business to the Midwest．<br/>

A He left behind lots of money． B His works were written for children． C His works are full of adventures． D He is famous for his great works．<br/>

A It has been published against Twain's will． B It shows Twain's respect for politicians． C It will be published in full． D It has been recently finished．<br/>

A A work in three volumes． B An imaginative work． C A collection of stories． D Memoirs of famous people．<br/>