• Think 4 Unit 4 Grammar
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  • When he was a child, Richard used to look after / to looking after his father's cattle.
    When he was a child, Richard used to look after his father's cattle.
  • The Masai people are used to hear / to hearing the sounds of lion at night.
    The Masai people are used to hearing the sounds of lion at night.
  • The lions have never got used to see / to seeing the flashing lights.
    The lions have never got used to seeing the flashing lights.
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