)измените форму present perfect active в present perfect passive. 1) i have already taken the books back to the library. the 2) she has just posted those letters. those 3)the teacher has already checked my test.my test.. 4)he has lost the key.the 5)we have opened all the windows.all the 6)i have bought bread on the way home. 7) i have done this exercise. this

1) I have already taken the books back to the library. The books have been taken back to the library 
2) She has just posted those letters. Those letters have just been posted. 
3)The teacher has already checked my test.My test has just been checked
4)he has lost the key.The key has been lost 
5)We have opened all the windows.All the windows have been opened 
6)I have bought bread on the way home.Bread was Bread has been bought on the way home
7) I have done this exercise. This exercise has been done. 

1 The books have been taken to the library.
2 The letters have been posted by her.
3 My test has been already checked by the teacher.
4 The key has been lost by him.
5 All the windows have been opened by us.
6 This exercise has been done.