单项选择题

A．People continued to explore new lands.
B．People started to make life better.
C．People stopped making inventions.
D．People started to explore more land.
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单项选择题
A．Telling jokes.B．Failing asleep during class.C．Staying late after class.D．Eating in the canteen.
A．Telling jokes.
B．Failing asleep during class.
C．Staying late after class.
D．Eating in the canteen.
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