Choose the sentences in which modal verbs express possibility. More than one correct answer is possible.

Tick the correct answers.

• Rick might have watched this episode.
• You shouldn't have let your dog out! It ran away.
• We needn't have arrived because we don't have classes today.
• Fiona must have already read this book. She bought it long ago.
• The teacher could have prepared this task in advance, but I'm not sure about it.
• Laura can't have stolen the money! She's not a thief.