单项选择题

A．Masses.
B．Molten lava.
C．Gasses.
D．Unknown substances.
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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.
A．The invention of machines.
B．The invention of the alphabet.
C．The invention of rockets.
D．The invention of agriculture.
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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