单项选择题

What is this passage mainly about

A．Approaches to the commercial use of computers.
B．Conveniences brought about by computers in business.
C．Significance of automation in commercial enterprises.
D．Advantage of credit cards in business.

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单项选择题

The phrase ring up sales most probably means ______

A．make an order of goods
B．record sales on a cash register
C．call the sales manager
D．keep track of the goods in stock

单项选择题

It can be inferred that ______.

A．computers will bring disaster
B．computer industry will not develop faster
C．computers will bring about more convenience to people’s life
D．None.