3．B　词义猜测题。由本段上一句可知，在司机出发之前，这个系统会对路况进行分析。

　　4．C　观点态度题。由文章最后一段可知，Professor Shahabi 希望自己的发明能够得到进一步推广，对前景很乐观。

　　Ⅱ.完形填空

　　Dale Carnegie rose from the unknown of a Missouri farm to international fame because he found a way to fill a universal human need.

　　It was a need that he first __1__ back in 1906 when young Dale was a junior at State Teachers College in Warrensburg. To get an __2__， he was struggling against many difficulties. His family was poor. His Dad couldn't afford the __3__ at college, so Dale had to ride horseback 12 miles to attend classes. Study had to be done __4__ his farmwork routines. He withdrew from many school activities __5__ he didn't have the time or the __6__. He had only one good suit. He tried __7__ the football team, but the coach turned him down for being too __8__. During this period Dale was slowly __9__ an inferiority complex (自卑感), which his mother knew could __10__ him from achieving his real potential. She __11__ that Dale join the debating team, believing that __12__ in speaking could give him the confidence and recognition that he needed.

　　Dale took his mother's advice, tried desperately and after several attempts __13__ made it. This proved to be a __14__ point in his life. Speaking before groups did help him gain the __15__ he needed. By the time Dale was a senior, he had won every top honor in __16__. Now other students were coming to him for coaching and they, __17__， were winning contests.

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