单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will he given 15 seconds to answer the questions.
Now, listen to the passage.
According to the passage, how many miles is the earth’s diameter

A．2,000.
B．4, 000.
C．8,000.
D．16,000.

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单项选择题

单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will he given 15 seconds to answer the questions. Now, listen to the passage. According to the passage, how many miles is the earth’s diameter 您的浏览器不支持 audio 元素。