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[音频]2. Listen again for the details and fill in the blanks with what you hear.1) I thought it had something to do with the climate. The temperature 1 cooler and _2______.

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[音频]2) Yeah, that’s one theory. Another idea is that they _1____.

[音频]3) And you know, there’s even a theory that they __________ from outer space.

[音频]1. Listen to the dialogue for the main ideas and answer the following questions.1) What are the possible reasons why dinosaurs disappeared?

[音频]2) Does the man believe in the theory of alien invasion?