PTE Listening
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1 questions. Answer them all, then submit once for your section score.
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1.
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You will hear a recording. Type the missing word in each blank exactly as you hear it.
Astronomers classify stars using the Hertzsprung-Russell diagram, which plots against surface temperature. Most stars, including our sun, occupy a band called the main sequence, where they fuse hydrogen into . Once this fuel is exhausted, stars swell into red before ending their lives as white dwarfs, neutron stars, or black .