专四专八考试

【单选题】{{I}}Questions 4 to 7 are based on the following conversation.At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation.{{/I}} How long is the shaft
A、21 miles.
B．23 miles.
C．31 miles.
D．33 miles.

网考网参考答案：B
网考网解析：
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