单项选择题


A．Taxi driver and passenger
B．Doctor and patient
C．Shop assistant and customer
D．Waiter and guest
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填空题
When we got on the bus, we found no ______ (vacancy) seats.
单项选择题
What kind of people were the nine contestants
A．Professional athletes.
B．College students.
C．Workers.
D．Disabled people.
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