Complete the sentences with for, since, yet or already.
1. George has....
fed the dog. Don't worry.
2. I have ......
.. seen her before.
3. He has waited for you ....
.... 3 o'clock.
4. My parents have been away
...... a week.
5. No, we haven't had a holiday......
6. We have been friends ......
.... 2003.
7. I haven't done my homework.....
8. Sue hasn't phoned me
..... ... days.
9. Mary has ......
packed his clothes,
10. They haven't seen us .....
.... last year.​