单项选择题

A．Being unable to communicate face to face with others.
B．Having exams and tests.
C．Phone calls are expensive.
D．Professors are tough.
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单项选择题
The author persuades people not to use new technologies because they are expensive.
A．Y
B．N
C．NG
单项选择题
It can be inferred from the third paragraph that______.
A．one objective will confuse the selected audience
B．a set of objectives will help to attract new employees
C．one objective will make the selected audience know what to do
D．a set of objectives will help the selected audience know more about the campaign,.
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