Complete with could or may not.

1.There's someone at the door.It___be Alex.35 БАЛЛОВ ДАЮ
2.Mum____have time to goto the supermarket.She's very busy.
3.I____have lunch.I'm not very hungry.
4.Hmm... yes, you___be right.I hadn't thought abaot this.
5.Craig___ go to school tomorrow.He's ill.
6.There's a letter on the table.It___be from Julia.
7.Cosmo isn't in his basket.He___in the kitchen