1) A: Why aren’t you doing your homework?
B: I can’t do it. I left my books at school.
2) A: Have you ever been to America?
B: Yes, I have. I have been there twice.
A: When were you there?
B: For the first time a was there in 1998.
3) A: There isn’t any milk left. We have drunk it.
B: I can’ believe it. Yesterday I bought 3 litres.
4) A: They haven’t got a car any more. They have sold it.
B: When did they do it?
5) A: Have you found your pen?
B: Yes, I have. I found it last Tuesday.