1. 1) I have seen...
2) They have been talking all day
3) She already has been in my house
4) I have been swimming for two hours
5) He has been working
6) She has known him...
7) It has been snowing all day
8) They have traveled...
9) I have just eaten...
10) He has never been to Moscow
2. 1) been to
2) gone to
3) been in
4) been to