指出下列句子划线部分是什么句子成分: 1. The students got on the school bus. 2. He handed me the newspaper. 3. I shall answer your question after class. 4. What a beautiful Chinese painting! 5. They went hunting together early in the morning . 6. His job is to train swimmers . 7. He took many photos of the palaces in Beijing . 8. There is going to be an American film tonight. 9. He is to leave for Shanghai tomorrow. 10. His wish is to become a scientist . 11. He managed to finish the work in time . 12. Tom came to ask me for advice . 13. He found it important to master English . 14. Do you have anything else to say ? 15. To be honest ; your pronunciation is not so good. 16. Would you please tell me your address ? 17. He sat there , reading a newspaper. 18. It is our duty to keep our classroom clean and tidy . 19. He noticed a man enter the room. 20. The apples tasted sweet.