24．Some people claim that a man on a motorcycle is safer than a man in a car because______.

A．car race is a sport with several disadvantages

B．motorcyclists must drive very carefully

C．most people want to keep a distance from the dirty motorcycles for fear that they should lose dignity

D．motorcycles tend to be accepted by more and more people

23．It Can be inferred that______

A．there existed different opinions towards motorcycling sport

B．all good guys in cowboy movies weal white

C．animals in the woods like motorcycles because motorcyclists usually feed crashed insects to them

D．motorcycles will make noise as soon as people go to sleep

22．From the passage we know that good characters of old American movies_____.

A．usually wore lighter colors

B．had no difference from evil characters

C．looked gracious

D．often rode horses

21．According to the passage，the average Americans believe that_____.

A．motorcyclists are all blue-collar workers

B．motorcycling has become one ofAmerica’s most popular sports

C．only wild，irresponsible，lawless young men enjoy motorcycling

D．motorcyclists can't afford to buy cars

19．A．duty　　　　 B．opportunity　　 C.ability　　　　　 D．eourage

18．A．importance　　 B．ability　　　 C．impression　 　　D．influence

17．A.absence　　　　 B．refusal　　　 C．confusion　　　 D．decision

16．A．and　　　　　 B.however　　　 C.or　　　　　　　 D．so

15．A.attitude　　　　 B．unwillingness　　 C．teaching　　 D．response