say what hat happened.прошу помогите

1) James has washed his car 2) Kate has watered her plants 3) mum and dad have opened their bedroom window 4) the children have finished their homework 5) Mary has seen the film 6) my friends have visited the British museum 7) Emma has washed her hands 8) the smiths have decided where they spend their weekend 9) Margo has been to the shops 10) jake has cooked his supper