单项选择题

A．Through food.
B．Through air
C．Through insects.
D．Through body fluids.
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单项选择题
A．Friends.B．A police officer and an investigator.C．Two police officers.D．A police officer and a program hostess.
A．Friends.
B．A police officer and an investigator.
C．Two police officers.
D．A police officer and a program hostess.
单项选择题
A．She was afraid of the professor.B．She didn’’t enter her house.C．She didn’’t make full preparations for her lessons,D．She lost her key.
A．She was afraid of the professor.
B．She didn’’t enter her house.
C．She didn’’t make full preparations for her lessons,
D．She lost her key.
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