1. Where the President lives is still a mystery 2. I know why that lady was angry. 3. Bob felt sick when he knew his English grade 4. The policeman hoped they could help the hostage in time. 5. The Chinese vase which was broken belonged to my grandmother. 6. As soon as the bell rings three times, the students rush out of the classroom 7. Amy succeeded because she worked hard. 8. I don't know where the Ramkhamhaeng library is 9. he wanted to know the girl who owned the flower shop 10. She cried as if she were really sad.