单项选择题

A．John has lost something at the railway station
B．There are several railway stations in the city
C．It will be very difficult for them to find John
D．The train that John is taking will arrive soon
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单项选择题
In discussing the marketing concept, the author focuses on______.
A．its social impact
B．its theoretical basis
C．its possible consequence
D．its main characteristic
单项选择题
Admission officers evaluate applications in the same way.
A．Y
B．N
C．NG
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