单项选择题

A) caused C) due
B) made D) dedicated

A．caused
B．made
C．due
D．dedicated
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单项选择题
One of the reasons why half of PCs are not connected to the Web is that ______.
A．the software is not user-friendly
B．people have no interest in the Web
C．the Web information is not reliable
D．people are too busy to get connected to the Web
单项选择题
Electronic commerce becomes a new type of commerce when ______.
A．paper-based trading is moved on to the Web
B．the efficiency of the existing process is improved by the Internet
C．a Web site offers more goods than a store
D．new buyers and sellers find each other on the Internet
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