单项选择题

Questions 19-22 are based on the following dialogue:
What attitude has the speaker shown toward the American solar energy industry

A．Romantic.
B．Cautious.
C．Optimistic.
D．Impressive.

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单项选择题

单项选择题

Questions 19-22 are based on the following dialogue: What attitude has the speaker shown toward the American solar energy industry 您的浏览器不支持 audio 元素。