• Permission, Obligation and Necessity
     Help
  • Which option is NOT possible? [We need to / We've got to / We can] check out before 12 or the hotel will charge us for another night.
    We can
  • Which option is NOT possible? When we were children, we [couldn't / shouldn't / weren't allowed to] stay out late.
    shouldn't
  • Which option is NOT possible? I [should have / must have / ought to have] packed some warmer clothes - I'm freezing!
    must have
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