----- Nội dung ảnh ----- 12. He has a piano and a violin, but he (not have)……………a flute. 13. He says that he (arrive)……………on time tomorrow. 14. She said that she (arrive)……………on time yesterday. 15. I think that Victor (be)……………late. 16. He said that he (graduate)……………from university in 1991. 17. We thought that they (move)……………to California. 18. The teacher said that water (consist)……………of hydrogen and oxygen. 19. I (be)……………there when you arrive. 20. They were still waiting when I (get)……………there. VI. Rewrite the sentences using "used to."