选择填空: A. / B. a C. an D. the ( )1. They are living ______ happy life now. ( )2. ______ bag on ______ desk is mine. ( )3. There is ______ empty box on the table. ( )4. Do you like ______ music of the film “Titanic”? ( )5. On ______ Saturday, I stay in ______ bed till 12:00. ( )6. ______ Browns have been to China twice. ( )7. Don't make any noise in ______ class. ( )8. This is such ______ interesting story that you must listen to it. ( )9. Next week they will go to Australia by ______ air. ( )10. Which is bigger, ______ sun or ______ moon?