That day nora had a walk before classes исправить предложение

explain (объяснять) – explanation (объяснение)

know(знать) – knowledge (знания)

inform(информировать) - information (информация)

progress(развиваться) – progress (развитие)

.1.-open the window.

-but i have opened the window.

2.i have seen the film.

3.he has opened the door.

4.they have cleaned the room.