考博英語模擬

Questions 21 to 25 are based on the following passage. -O-?hsV)y
Moreand more, the operations of our businesses, governments, and financialinstitutions are controlled by information that exists only inside computermemories. Anyone clever enough to modify this information for his own purposescan reap substantial rewards. Even worse, a number of people who have done thisand been caught at it have managed to get away without punishment.