单项选择题

A．At the end of the online catalogue.
B．At the Reference Desk.
C．In the New York Times.
D．In the Reader’s Guide to Periodical Literature.
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单项选择题
A．Synthetic fuel.B．Solar energy.C．Alcohol.D．Electricity.
A．Synthetic fuel.
B．Solar energy.
C．Alcohol.
D．Electricity.
单项选择题
A．Teacher and student.B．Doctor and patient.C．Manager and office worker.D．Travel agent and customer.
A．Teacher and student.
B．Doctor and patient.
C．Manager and office worker.
D．Travel agent and customer.
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