单项选择题

A．Finding a book in the library.
B．Making a phone call.
C．Seeing a doctor in a hospital.
D．Solving an arithmetic problem.
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单项选择题
A．The train is cheaper than the bus.B．The bus is cheaper than the train.C．There are two buses every day.D．The train is faster than the bus.
A．The train is cheaper than the bus.
B．The bus is cheaper than the train.
C．There are two buses every day.
D．The train is faster than the bus.
单项选择题
A．George Washington.B．Ben Johnson.C．State rights.D．The history of U.S. presidents.
A．George Washington.
B．Ben Johnson.
C．State rights.
D．The history of U.S. presidents.
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