becoming horrible."可推知，路上的麻烦大多是由驾驶员的不良行为引起的，行车礼貌问题正变得可怕，故选B项。]

　　3．According to the writer，a good driver should ．

　　A．encourage children to cross the road whenever they want to

　　B．beat back when forced to face rude driving

　　C．be able to recognize politeness when he sees it

　　D．join in a traffic stream quickly however other people feel

　　C　[推理判断题。根据第二段的最后两句"But such behavior of politeness is by no means enough.Many drivers nowadays don't even seem able to recognize politeness when they see it."可推知，一个好的驾驶员应该能够认可道路礼貌行为，故选C项。]

　　4．It is not always right for drivers to ．

　　A．master the roadmanship

　　B．neglect politeness when they see it

　　C．give a friendly nod in answer to an act of politeness

　　D．encourage old ladies to cross the road whenever and wherever they want to

　　D　[细节理解题。根据第三段的第一句"However，misplaced politeness can also be dangerous."和第三段的最后一句"The same goes for encouraging old ladies to cross the road wherever and whenever they want to."可知，鼓动老妇人随时随地穿马路并不总是正确的，故选D项。]

　　B

　　SAN FRANCISCO - Riding a motorcycle can be fun，but being in an accident is not.Driving a car is safer，but traffic and parking can be annoying.

　　What if you got rid of the disadvantages of both? You might try the C­1，an electric motorcycle.For protection，the bike has a metal shell and is controlled like a car.Two big gyroscopes (陀螺仪) under the floor are designed to keep it upright，even when a car hits it from the side.Its top speed is 120 miles an hour.

Lit Motors is developing the C­1.Its 33­year­old chief