单项选择题

A．He paid it today for the first time.
B．He pays it after it’’s due.
C．He pays it on the last day of the month.
D．He’’s planning to pay it tomorrow.
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单项选择题
A．They are necessary for modern man.B．They are unnecessary for survival.C．They are as good as computers.D．They are dangerous for us.
A．They are necessary for modern man.
B．They are unnecessary for survival.
C．They are as good as computers.
D．They are dangerous for us.
单项选择题
The writer expects that by 2010 new technology will have revolutionized communications and________.
A．bookshops will not exist
B．the present postal system will have disappeared
C．people will no longer send letters
D．the postmen will have been replaced by the motor car
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