单项选择题

Salesmen use computers mainly to ______.

A．check the list of goods and materials that are kept in the store house
B．play games for pleasure
C．talk with their friends
D．write letters
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单项选择题
Computers used to ______.
A．work rapidly
B．be large and expensive
C．be used for fun
D．be easy to use
单项选择题
By what date is it necessary to reply to the invitation
A．2nd April.
B．2nd August.
C．22nd March.
D．4th May.
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