单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A．By studying the signs around them with eyes and brains.
B．By changing the weather.
C．By controlling the weather.
D．By listening to others’ advice.

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单项选择题

单项选择题

Passage TwoQuestions 30 to 32 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。