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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】My father was a foreman of a sugar-cane plantation in Rio Piedras, Puerto Rico. My first job was to drive the oxen that ploughed the cane fields. I would walk behind an ox, guiding him with a broomsti...
A.
he should work for those who he liked most
B.
he should work longer than what he was expected
C.
he should never fail to say hello to his owner
D.
he should be respectful and faithful to the people he worked for