• SO B2 Units 3-4
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  • He set on/to/up his first business in 2013 and went on/for/by to become a billionaire.
    up, on
  • Has someone switched on/by/off the air-conditioning? It seems to have got really hot again.
    off
  • We’ll have to stop at the service station or we’ll run out of/with/over petrol soon.
    out of
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