Complete the text with the verbs in the passive.
Supermarkets in Britian were alerted yesterday after a number of black widow spiders [discover] in boxes of grapes which [ship] from the USA. The spiders,which have a deadly bite, had crept into the boxes while the grapes [pack] in Arizona. The alarm [raise] last week when two spiders [spot] by a worker who was inspecting the grapes. The spiders [immediately/put] into a box and later identified as black widow spiders. An expert from Bristol Zoo said' If a spider [find] in a box of fruit, the box [should/reseal] and the authorities [must/notify] straightaway. Anyone who [bite] by one of these spiders should see a doctor as soon as possible