Give the correct form of the verds in brackets

Give the correct form of the verds in brackets:
1/ There's someone at the door."That (be) ...............the postman"
2/ When Jane was at school , she( always, lose)...................things"
3/ Nobody bothered to tell me that the school( decide).......... to have a special holiday on Friday.
4/Doesn't this room  ? I (put)................some posters up on the walls