When Jeff was three years old, the 1______ (absent) of mind of a taxi driver caused a terrible accident, resulting in Jeff's 2_______ (disable).One of his legs had to be cut 3____. In spite of this, he grew to be tough and 4______ (ambition).At 19, he went to university, majoring in computer engineering, which he thought was suitable 5 ______ his condition. Two years later, he succeeded in developing a computer system,which made students easily6_____ (access) to the digital resources of the library.7______ many ways, he thought his experience and efforts turned out to be 8______(benefit)to his improvement. Last year, he was employed by a large company right after his 9______(graduate).