• B2 FCE Unit 3 Past Simple and Continuous
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  • I always 'used to worry / was worrying' if I made grammatical mistakes in English, but I couldn’t care less now.
    used to worry
  • During her five years at university, she seldom 'socialised / was socialising' with other students.
    socialised
  • She 'used to scuba dive / was scuba diving', when a shark suddenly appeared.
    was scuba diving
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