Change these sentences into reported speecch:
1. Betty wonders,"When did I send a letter to my parents?"
2. My father has told me,"You must choose the person who can try his best to do this work?"
3. Hong told Hoa,"I want to know what was Mon doing at that time"
4. Simon is saying to Susan,"Would you and Maline like to come to my party?"
5. "I have left my key a home. What time is it now?" she said to Tan.