Помогите с этим упражнением, пожалуйста

1 А neighbour is believed to be involved in the crime. 2 We were not allowed to leave before finishing the text. 3 Photographs mustn't be taken in the museum. 4 The students are being informed about the trip right now. 5 Why was our invitation turned down, Paola? 6 A present was given to Nelly by the company.