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单项选择题

A．In Boston.
B．in Concord.
C．In Lexington.
D．In Britain.
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单项选择题A．It’s right.B．It’s awful.C．It’s wrong.D．It’s a fact.

A．It’s right.
B．It’s awful.
C．It’s wrong.
D．It’s a fact.

单项选择题A．Experimental medicines.B．Special treatment centers.C．Flexible work schedule.D．Innovative physical exercise.

A．Experimental medicines.
B．Special treatment centers.
C．Flexible work schedule.
D．Innovative physical exercise.