7590根据以下材料，回答题。The First Bicycle The history of the bicycle goes back more than 200 7940
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根据以下材料，回答题。 The First Bicycle The history of the bicycle goes back more than 200 years. In 1791， Count de Sivrac （51 ）onlookers in a park in Paris as he showed （52） his two-wheeled invention， a machine called the celerifere. It was basically an （53）version of a children"s toy which had been in use for many years. Sivrac"s "celerifer6" had a wooden frame， made in the （54） of a horse， which was mounted on a wheel at either end. To ride it，you sat on a small seat ，just like a modern bicycle， and pushed （55）against the （56） with your legs-there were no pedals. It was impossible to steer a celerifere and it had no brakes， but despite these problems the invention very much （57）to the fashionable young men of Paris. Soon they were （58） races up and down the streets. Minor （59 ） werecommonasridersattemptedafinalburstof （60）. Controlling the machine was difficult，as the only way to change （61） was to pull up the front of the"celerifere" and （62）it round while the front wheel was spinning in the air."Celeriferrs" were not popular for long， （63 ）， as the （64 ） of no springs， no steering and rough roads made riding them very uncomfortable. Even so， the wooden eelerifer6 was the （65 ） of the modem bicycle. 请在第__（51）__处填上正确答案。 查看材料 A.delighted B.cheered C.appreciated D.overjoyed 请帮忙给出正确答案和分析，谢谢！
