ex.4
Complete the question and short answers.
1. Have Mike and Jenny arrived?(arrive) No,they .......
2. .......you.......your homework? (do) Yes,i .......
3. .......he.........the new U2 CD? (buy) Yes,he ........
4. .......your parents........on holiday? (go) No,they........

1/  haven't.2/ Have you done  -   have.3/ Has he bought  -  has.4/ Have your parents gone  -  haven't.