单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
What is the passage mainly about

A．Selling and buying.
B．What is the market
C．Everything you do is producing for the market.
D．What the market can do for you

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. What is the passage mainly about 您的浏览器不支持 audio 元素。