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esercizio 16 - capitolo workbook 9 - animals and us

jean must have forgotten about the party.
the students must have finished their test because they're talking loudly.
you can't have bought enough biscuits for everybody. i can only see three packets here!
she may have left work already.
he must have had his hair cut. yesterday it was long and today it’s very short.
the shoe store might have been closed last sunday but i don't remember.
she must have practised a lot. her performance was perfect!
i can't find my watch anywhere. i must have lost it on the bus. i'm sure!