【正文】
rses having saved their drivers from danger of death. Today for the most part, people travel by train, ship, airplane, and car, but very little by the Use of horses. Modem vehicles are propelled by engines, and an engine does not have any sense. In case of danger, many horses could be depended on to help. Not so with the engine。 or if you have a valid medical certificate which excuses you from wearing it. Make sure these circumstances supply to you before you decide not to wear your seat belt. Remember you may be taken to court for not doing so, and you may be fined if you cannot prove to the court you have been excused from wearing. 20. This passage is probably taken from ______. A. medical magazine B. a legal document C. a textbook D. a government information booklet 21. Wearing a seat belt in a vehicle ______. A. reduces road accidents by more than half B. reduces the death rate in traffic accidents C. saves lives while driving at a speed up to 30 miles per hour D. saves more than 16,000 lives each year 22. It is the driver’s responsibility to ______. A. make the front seat passenger wear a seat belt B. make the front seat chil