单项选择题

A．Vacations.
B．Wages.
C．Overcrowded classrooms.
D．Paid sick leaves.
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单项选择题
A．To keep fish alive.B．To punish criminals.C．To preserve dead bodies.D．To help heal wounds.
A．To keep fish alive.
B．To punish criminals.
C．To preserve dead bodies.
D．To help heal wounds.
单项选择题
A．They lived in caves.B．They traveled in groups.C．They had an advanced language.D．They ate mostly fruit.
A．They lived in caves.
B．They traveled in groups.
C．They had an advanced language.
D．They ate mostly fruit.
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