单项选择题

A．The invention of machines.
B．The invention of the alphabet.
C．The invention of rockets.
D．The invention of agriculture.
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单项选择题
A．They saw a woman running fast along the road.B．They saw a woman running after a man.C．They saw a woman running and shouting for help.D．They saw a man beating a woman.
A．They saw a woman running fast along the road.
B．They saw a woman running after a man.
C．They saw a woman running and shouting for help.
D．They saw a man beating a woman.
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