单项选择题

A．Their horses were frightened by the plow.
B．They preferred lighter tools.
C．The plow was too expensive.
D．They thought it would ruin the land.
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单项选择题
A．By car.B．By air.C．By train.D．By bus.
A．By car.
B．By air.
C．By train.
D．By bus.
单项选择题
A．He was James Oliver’s assistant.B．He was born in Europe.C．He was opposed to scientific agriculture.D．He spent his own money on promoting his invention.
A．He was James Oliver’s assistant.
B．He was born in Europe.
C．He was opposed to scientific agriculture.
D．He spent his own money on promoting his invention.
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