cần gấp aaaaaaaaaaaaaaaaaaa

1. John bought the watch, although it was expensive.
2. John bought the watch. However, it was expensive.
3. I finished the homework. It wasn't easy.
4. I finished the homework, although it wasn't easy.
5. I finished the homework, however it wasn't easy.
6. Despite the fact that it wasn't easy, I finished the homework.
7. She went for a long walk, despite being cold.
8. Although she was cold, she went for a long walk.
9. She was cold. She went for a long walk, however.
10. The restaurant has a good reputation, however, the food was terrible.
11. Despite the restaurant's good reputation, the food was terrible.
12. It was a beautiful, well-decorated office, however the atmosphere was terrible.
13. Although it was a beautiful, well-decorated office, the atmosphere was terrible.
14. Although it was the long day, I didn't feel tired.
15. She spoke for only 5 minutes, however she said it was a very complicated matter.