专四专八考试

【单选题】Questions 21 to 23 are based on the following news.At the end of the news item, you will be given 15 seconds to answer the questions.
Now listen to the news.
What is the definition of a tornado warningA．The formation of a funnel clouD、
B．The sighting of a funnel clouD、
C．The bulletin issued by the National Weather Service.
D．The convergence of favorable conditions for a funnel cloud to form.

网考网参考答案：D
网考网解析：
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