单项选择题


A．available
B．used
C．got
D．estimated
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单项选择题
What eventually happened to the rich, powerful country 2 000 years ago
A．Its people died of hunger.
B．It fell to pieces.
C．It became a giant empire.
D．It built many ships with wood.
单项选择题
A．peopleB．menC．humansD．adults
A．people
B．men
C．humans
D．adults
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