单项选择题

A．The student can’t leave unless he has put everything back in the cupboard.
B．The student can leave after he turns off the electricity.
C．The student can leave after he has tidied the lab.
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单项选择题
A．News about parties, clothes and marriages.B．Advice about food and health.C．All of the above.
A．News about parties, clothes and marriages.
B．Advice about food and health.
C．All of the above.
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