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.
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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D．the postmen will have been replaced by the motor car
单项选择题
A．England.B．Ivory Coast.C．Sweden.D．Germany.
A．England.
B．Ivory Coast.
C．Sweden.
D．Germany.
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