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.
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单项选择题
A．Advertise for companies.B．Sell watches and food.C．Sell shirts and shoes.D．Compete in a game.
A．Advertise for companies.
B．Sell watches and food.
C．Sell shirts and shoes.
D．Compete in a game.
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