单项选择题


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 warning

A．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.
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单项选择题
The Suez Canal is mentioned as an example of a ______.
A．modern canal
B．water level canal
C．lock canal
D．irrigation canal
单项选择题
What can we infer about the woman
A．That she has stopped smoking.
B．That she does not want to get married.
C．That she has asked the man to quit smoking many times.
D．That she is not in love with the man.
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