题目内容：
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 off his two-wheeled invention, a machine called the celerifere.
It was basically an __________ (52) version of a children's toy which had been in __________ (53) for many years. Sivrac's "celerifere" had a wooden flame, 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 modem 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) were common as riders attempted a final burst of __________ (60).
Controlling the machine was difficult, as the only way to change __________ (61) was to pull up the front of the "celenf" and (62) it round while the front wheel was __________ (63) in the air. "Celeriferes" were not popular for long, however, as the __________ (64) of no springs, no steering and rough roads made riding them very uncomfortable. Even so, the wooden celerifere was the __________ (65) of the modem bicycle.
回答(51)题 A．delighted
B．cheered
C．appreciated
D．overjoyed
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