单项选择题


Questions 15—18

A． Library.
B． Sports hall.
C． Medical service.
D． Cafeteria.
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单项选择题
A． Office management.B． Mechanical engineering.C． Air conditioning.D． Automobile industry.
A． Office management.
B． Mechanical engineering.
C． Air conditioning.
D． Automobile industry.
单项选择题
A． Blood diseases.B． Heart attacks.C． Colds or flu.D． Pneumonia.
A． Blood diseases.
B． Heart attacks.
C． Colds or flu.
D． Pneumonia.
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