Answer:
1. Yes, I did. I sent it to her.
2. Mum, I can't sleep. Will you read me a story?
3. But I've already offered it to him.
4. Yes, I have already shown them to him.
5. Sorry. I can't give you my telephone number.
6. I think I should write to him right now.
7. No, I haven't. Please, tell it to me.
8. No, she wasn't at home. But I'll give it to her tomorrow.