Is my translation ok?
1) I am opening the book and i am reading story to boys.
Librum aperio et fabulam puero legio.
2) Fields and gardens are dedicated to Faunus, acre to goddess of agriculture.
Campi et horti Fauno sacros sunt, agri deae agriculturae.
3) Miserable boys and girls, why are you opening doors of Troy?
O miseri pueri et puellae, cur Troiae portam aperitis?