B

　　(2016·石家庄高三教学质检二)Almost everybody in America will spend a part of his or her life behind a shopping cart. They will in a lifetime, push the chrome­plated_contraptions many miles. But few will know — or even think to ask — who it was that invented them.

　　Sylvan N. Goldman invented the shopping cart in 1937. At that time he was in the supermarket business. Every day he would see shoppers lugging groceries around in baskets they had to carry.

　　One day Goldman suddenly had the idea of putting baskets on wheels. The wheeled baskets would make shopping much easier for his customers, and would help to attract more business.

　　On June 4, 1937, Goldman's first carts were ready for use in his market. He was terribly excited on the morning of that day as customers began arriving. He couldn't wait to see them using his invention.

　　But Goldman was disappointed. Most shoppers gave the carts a long look, but hardly anybody would give them a try.

　　After a while, Goldman decided to ask customers why they weren't using his carts. “Don't you think this arm is strong enough to carry a shopping basket？” one shopper replied.

　　But Goldman wasn't beaten yet. He knew his carts would be a great success if only he could persuade people to give them a try. To this end, Goldman hired a group of people to push carts around his market and pretend they were shopping! Seeing this, the real customers gradually began copying the phony (假的) customers.

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