a) Mike can`t have stolen / might steal / must have stolen / could steal the necklace as his finger prints were fund

1.  Mike could steal the necklace as his finger prints were found all over it.
2.  Hilary’s late! Her car might break down it though that seems father as it`s a new one.
3.  He couldn’t have stolen the money - he was with me all afternoon.
4.  Marie Celeste might have been attacked by pirates but we will never know.
5.  My mobile phone doesn\'t work - I must have forgotten to recharge it.
6.  Luce isn’t in school today. She might be ill.
7.  You look so well and rested, you could have a lovely holiday!