单项选择题

A．Boston schools.
B．Frontier life.
C．Teaching requirements.
D．Immigration patterns.
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单项选择题
A．5 per cent.B．25 per cent.C．15 per cent.D．10 per cent.
A．5 per cent.
B．25 per cent.
C．15 per cent.
D．10 per cent.
单项选择题
A．The color of the dog.B．The price of the dog.C．Whether the dog will fit the environment.D．Whether the dog will get along with the other pets in the house.
A．The color of the dog.
B．The price of the dog.
C．Whether the dog will fit the environment.
D．Whether the dog will get along with the other pets in the house.
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