https://wordwall.net/resource/69875527/angielski/past-perfect-or-past-simple-exercise-1-perfect
https://wordwall.net/resource/69877759/angielski/past-perfect-or-past-simple-exercise-2-english
https://wordwall.net/resource/69878866/angielski/past-perfect-or-past-simple-exercise-3-english
https://wordwall.net/resource/69879548/angielski/past-perfect-or-past-simple-exercise-4-english