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.