单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Only one hour.
B．Some hours.
C．One week.
D．Two weeks.
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单项选择题
A．Computer science.B．Physics.C．Chemistry.D．Mathematics.
A．Computer science.
B．Physics.
C．Chemistry.
D．Mathematics.
单项选择题
A．They can stay away as they want.B．They will be punished severely.C．They will be sent back home.D．They will be denied further education.
A．They can stay away as they want.
B．They will be punished severely.
C．They will be sent back home.
D．They will be denied further education.
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