练习材料：
Lesson 56 Faster than sound
First listen and then answer the question
How fast did the winning car go?
Once a year, a race is held for old cars. A lot of cars entered for this race last year and there was a great deal of excitement just before it began. One of the most handsome cars was a Rolls-Royce Silver Ghost. The most unusual car was a Benz which had only three wheels. Built in 1885, it was the oldest car taking part. After a great many loud explosions, the race began. Many of the cars broke down on the course and some drivers spent more time under their cars than in them. A few cars, however, completed the race. The winning car reached a speed of 40 miles an hour, much faster than any of its rivals. It sped downhill at the end of its race and its driver had a lot of trouble trying to stop it. The race gave everyone a great deal of pleasure. It was very different from modern car races but no less exciting.
任务配置：
L0+L4
知识笔记：
enter for /ˈɛntər/ /fɔr/ 参加
Rolls-Royce Silver Ghost /roʊlz-rɔɪs/ /ˈsɪlvər/ /goʊst/ 劳斯劳斯银魅汽车，生产于1906年 - 1925年（参考维基百科）
wheel /wil/轮子
course /kɔrs/跑道，行程the route or direction followed by a ship, aircraft, road, or river.
completed/kəmˈplitəd/完成
sped /spɛd/速度
downhill /ˈdaʊnˈhɪl/下坡
