hãy chuyển các câu sau sang gián tiếp

1. He asked me if I had travelled abroad much.
2. The boss asked the secretary who had written that note.
3. My friend said to me that she had just received a postcard from her sister.
4. The chairman said the students had also taken part in arranging the conference.
5. the stranger asked me if i had been there long.
6. The policman asked the boy if he had really seen that happen with his own eyes.
8. he asked her if she had watch the detective film on TV the previous day.
9. He said this story had happened long before and few people remembered anything about it.
10. She said she hadn't read so interesting a book since she didn't remember when.