John ………. at the bank till 10, so he only arrived here five minutes ago.

.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.

здесь нужно вставить since or for!

так вот: 1. since 2. for 3. for 4. for 5. since 6. since 7. for 8. since это точно правильно)