Ответы
1) Look! Somebody (has broken) that window.
2) I (have been reading) the book you gave me but I (have not finished) it yet.
3) "Sorry I am late." That is all right. I (have not been waiting) long.
4) Hello! I (have been cleaning) the windows. So far I (have cleaned ) five of them and there are two more to do.
5) There is a strange smell here. (Have you been cooking) something?
6) My brother is an actor. He (has appeared) in several films.
7) "Sorry, I'm late." "That's alright. I have not been waiting long."
8) "Is it raining?" "No, it has stopped."
9) I have lost my address book. Have you seen it?
10) I have been reading the book you lent me, but I have not finished it yet.
11) I have read the book you lent me, so you can have it back now.
12) This is a very old book.I had it since I was a child.