w was just a bent stick and string. In fact, more changes have taken place in a bow in the past 25 years than in the last 7 centuries. Today, bow is forceful. It is as exact as a gun. In addition, it requires little strength to draw the string. Modern bows also have precise aiming devices. In indoor contests, perfect scores from 40 yard mon. The invention of the bows itself ranks with discovery of fire and the wheel. It was a great-step-forward for man.РQuestions 18 to 20 are based on the passage you have just heard.Р18. Why did man have to track his target at a close range when using a short bow?Р19. What does the passage tell us about the long bow?Р20. What do we know about modern bows?Р参考答案РPart IР1.C 2.C 3.B 4.D 5.BР6.D 7.A 8.C 9.D 10.DР11.D 12.A 13.B 14.C 15.BР16.A 17.A 18.C 19.B 20.A
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