单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Billy.
B．Peter.
C．The man’s brother.
D．The woman’s brother.
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单项选择题
A．They eat or destroy plants.B．They provide plants with continued oxygen supply.C．Their manure is eaten by plants.D．Their manure improves the quality of soil which plants live on.
A．They eat or destroy plants.
B．They provide plants with continued oxygen supply.
C．Their manure is eaten by plants.
D．Their manure improves the quality of soil which plants live on.
单项选择题
A．The differences between sheep and cattle breeding.B．Food shortages in the early 1800’s.C．Living conditions in the colony of Massachusetts.D．Livestock raising on early American farms.
A．The differences between sheep and cattle breeding.
B．Food shortages in the early 1800’s.
C．Living conditions in the colony of Massachusetts.
D．Livestock raising on early American farms.
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