Chicago is called "City of the Big Shoulders" for many Big aspects, such as the big transportation center, the manufacturing industry, the busy port, and its stretching land etc.

A．Most of them are top students majoring in computer programming.
B．For them, computer programming is the sole purpose for their life.
C．They can always stay with the computer at the center without eating and sleeping.
D．They lose all of their friends because of their deep "love" for the computer.