单项选择题

Questions 11 to 14 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.
How much of the time did the gold medal winners smile during the medal ceremonies

A．10%.
B．20%.
C．70%.
D．30%.

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单项选择题

单项选择题

Questions 11 to 14 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. How much of the time did the gold medal winners smile during the medal ceremonies 您的浏览器不支持 audio 元素。