单项选择题

A．They rubbed sticks together to make fire.
B．They used horses to surround wild animals. C) They hunted wolves as food.
C．They utilized their natural surroundings.
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单项选择题
A．He could take a taxi, and then change to a bus.B．He must first take the underground and then change to the shuttle bus.C．He could take bus, shuffle bus, or the underground.D．He could take the underground, and then take a taxi.
A．He could take a taxi, and then change to a bus.
B．He must first take the underground and then change to the shuttle bus.
C．He could take bus, shuffle bus, or the underground.
D．He could take the underground, and then take a taxi.
单项选择题
A．He is dry and boring.B．He is wonderful.C．He knows his subject well.D．He has a sense of humor.
A．He is dry and boring.
B．He is wonderful.
C．He knows his subject well.
D．He has a sense of humor.
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