单项选择题

According to the passage, a complete conversion can take______.

A．several months.
B．about a year.
C．half a year.
D．several years.
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单项选择题
The author seems to feel that most companies______.
A．will be on computers within five years.
B．lose money whenever the computers go down.
C．have trouble making the conversion to computers.
D．do not save money by using the computer.
单项选择题
By mentioning that Socrates himself never wrote anything, the writer implies that______.
A．it was surprising that Socrates was so famous.
B．Socrates was not so learned as he is reputed to have been.
C．Socrates used the work of his students in teaching.
D．the authorities refused to publish Socrates' works.
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