对下列句子的画线部分提问。 1. My favorite subject is history . _____ is _____ favorite subject? 2. Jeff likes P.E. because it is relaxing . _____ _____ Jeff like P.E.? 3. Mrs Jones usually eats breakfast at seven-thirty. _____ _____ does Mrs Jones usually _____ breakfast? 4. Bob wants to join the chess club. _____ _____ does Bob want to join? 5. His father can play the violin. _____ can his father _____? 6. My favorite actor is Zhou Runfa. _____ is _____ favorite actor? 7. Mary's birthday is September first. _____ _____ Mary's birthday? 8. His cousin is three years old. _____ _____ is his cousin? 9. Her new pen is two yuan. _____ _____ is her new pen? 10. He eats carrots for dinner. _____ _____ he eat for dinner?