单项选择题

Passage One Questions 11 to 13 are based on the passage you have just heard.

A．The advantages of an economy based on farming.
B．Reason that 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．The woman bought the jeans cheaper than the man’s wife.B．The jeans the woman bought was worth the money.C．The man’s wife bought two jeans for 150 yuan.D．The man’s wife is good at bargaining.
A．The woman bought the jeans cheaper than the man’s wife.
B．The jeans the woman bought was worth the money.
C．The man’s wife bought two jeans for 150 yuan.
D．The man’s wife is good at bargaining.
单项选择题
The assumption of free entry implies that if firms in an industry are earning excessively high profits, new firms that seek to do the same thing are likely to________.
A．bring up
B．build up
C．spring up
D．strike up
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