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.
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单项选择题
A．Barry no longer lives in New York.B．Barry doesn’t know how to economize.C．The woman called Barry in California.D．The woman didn’t ever meet Barry.
A．Barry no longer lives in New York.
B．Barry doesn’t know how to economize.
C．The woman called Barry in California.
D．The woman didn’t ever meet Barry.
填空题
It is necessary to make frequent ______ reading rate adjustment.
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