单项选择题

A．The advantages of an economy based on farming.
B．Reasons farmers continued using river transportation.
C．The role of cotton in the United States economy.
D．Improved methods of transporting farm crops.
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单项选择题
A．Get the results of the survey back.B．Draw the results of the survey.C．Make some conclusions.D．Collect more information
A．Get the results of the survey back.
B．Draw the results of the survey.
C．Make some conclusions.
D．Collect more information
单项选择题
The basic components of a sentence include ______.
A．a noun and a verb
B．a subject and a predicate
C．a noun and a predicate
D．a subject and a verb
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