单项选择题

Which period lasted longest

A．Paleolithic
B．Ice Age
C．Mesolithic
D．Neolithic
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单项选择题
Which of the following was developed earliest
A．The fish hook.
B．The first hatchet.
C．The bow and arrow.
D．Pottery.
单项选择题
What is the best alternative of the word address in the first paragraph
A．Speak.
B．Write.
C．Explanation.
D．Talk.
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