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 / 5 Will you wash the cups , please ? / But I have washed them. 6 .it is the funniest picture i have ever seen . 7 . понятия не имею(( . 8 it is the most difficult text we have ever translated. 9 . Have he ever been in Suzdai ? 10 . Have you ever been in an art gallery ?