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单项选择题

Many schools have bought computers for their students because of ______.

A．their wide variety
B．their wide use
C．the free choice of computers
D．the free choice of educational programs

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单项选择题The author discusses all of the items listed except ______.

A．word processing software
B．accounting software
C．educational software
D．salary software

单项选择题Which of the following can be concluded from this passage

A．Addition. subtraction, multiplication and division are the most important feature of accounting software.
B．Business people often use personal computers to work out complicated problems with the aid of accounting programs.
C．Business people use the accounting software because it is complicated but inexpensive.
D．An accounting program is a set of instructions that tells a personal computer merely to favour business people.