单项选择题

Questions 18 to 20 are based on the following passage. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the passage.
What is the passage mainly about

A．Crisis in Australia.
B．Excessive irrigation in Australia.
C．Lack of rain in Australia.
D．Water shortage in Australia.

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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 conversation, you will be given 15 seconds to answer the questions. Now listen to the passage. What is the passage mainly about 您的浏览器不支持 audio 元素。