单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the. questions.
Now listen to the passage.
What is the percentage of the sugar used as food

A．19%.
B．90%.
C．10%.
D．30%.

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单项选择题

单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the. questions. Now listen to the passage. What is the percentage of the sugar used as food 您的浏览器不支持 audio 元素。