Rewrite these sentences using one of the modal verbs in brackets.
1) It's possible that you will find some information about him on the internet. (can / might) 2) I am certain it's not illegal to download music. ( can't/mustn't) 3) I am sure he has a webpage. (could / must) 4) It's quite likely that she will buy a new laptop this week. (may / can) 5) It's possible that she has her mobile phone switched off. (must / could )