1. We still haven't heard from our grandson
2. Have you done the shopping yet?
3. No thanks,I've already eaten.
4. Have you tried Indian food before?
5. It's been two years,since I gave up eating sugar.
6. Has she ever been horse-riding?
7. Have you recently seen your old geography teacher?
8. That's the doorbell-I think Carrie's just arrived.
9. I haven't been on a good holiday for a long time.
10. This is the best essay so far I've read.