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．Experience in negotiating.B．A high level of intelligence.C．The time they spend on preparation.D．The amount of pay they receive.
A．Experience in negotiating.
B．A high level of intelligence.
C．The time they spend on preparation.
D．The amount of pay they receive.
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