填词补文：下面的短文有十处空白，短文后列出十二个词，其中十个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。 Brighton is a popular seaside town on the south coast of England. Not long ago, some policemen were very . There had been several serious accidents by motorists driving too fast. The police started to set up a speed trap(速度监视器). They measured a of 88 yards on a straight road and watched to see how long a car took to travel that far. They knew that if a car took six seconds, it was traveling faster than the limit of 30 miles an hour. When the policemen were ready, they hid behind a hedge (树篱) and started to time passing cars. During their first half an hour, they five drivers. The policemen wrote down the number of each car and the name and of the driver. But for the next half an hour the policemen didn’t see anybody driving too fast. They that this was very strange. One of them drove a quarter of a mile along the road and saw two students on the grass. They were holding up a sheet of cupboard so that could see it. On the notice one of the students had written:"Danger. Speed trap. " The policemen took the notice away and wrote down the names of the students. Later on they were each fined £5 for trying to stop the police catching motorists who were the law.