单项选择题

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A.Three weeks.
B.One month.
C.Three months.
D.Over a year.
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单项选择题
A.The differences between sheep and cattle breeding.B.Living conditions in the colony of Massachusetts.C.Food shortages in the early 1800s.D.Livestock raising on early American farms.
A.The differences between sheep and cattle breeding.
B.Living conditions in the colony of Massachusetts.
C.Food shortages in the early 1800s.
D.Livestock raising on early American farms.
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