句型转换。 1. Mr Liu often gets on line on Sundays. (改为一般疑问句) ________ Mr Liu often on line on Sundays? 2. Black used to live in a small village with his grandmother. (改为否定句) Black live in a small village with his grandmother. 3. Without knowledge, we can never make our country richer and stronger, ? (反意疑问句) 4. Where is the library ? Could you tell me ? (合并成宾语从句) Could you tell me  the library ? 5. He talked a lot about the things and persons. They remembered them in the school. (合并成定语从句) He talked a lot about the things and persons they remember in the school.