Here are the correct transformations of each sentence:
12. Although the salary was low, he accepted the job.
-> Despite the low salary, he accepted the job.
13. In spite of not having eaten for 24 hours, I didn't feel hungry.
-> Even though I hadn't eaten for 24 hours, I didn't feel hungry.
14. Her hand was injured but she managed to write.
-> Although her hand was injured, she managed to write.
15. Even though Sherry had excellent grades, she wasn't admitted to the university.
-> Despite having excellent grades, Sherry wasn't admitted to the university.
16. Even though the work was very hard, we enjoyed doing that job.
-> In spite of the work being very hard, we enjoyed doing that job.
17. Although Jane has very little money, she is happy.
-> Despite having very little money, Jane is happy.
18. In spite of her injured foot, she managed to walk to the village.
-> Although she had an injured foot, she managed to walk to the village.
19. Despite the low salary, I decided to accept the job.
-> Even though the salary was low, I decided to accept the job.
20. In spite of being the better team, we lost the match.
-> Although we were the better team, we lost the match.
21. Despite not having eaten for 24 hours, I didn't feel hungry.
-> Even though I hadn't eaten for 24 hours, I didn't feel hungry.
22. Despite the bad weather, they went out for a walk.
-> Although the weather was bad, they went out for a walk.
23. Even though his health is poor, he attends office regularly.
-> Despite the fact that his health is poor, he attends office regularly.
24. Although Peter practises hard, he can't pass the driving test.
-> Peter practises hard, but he can't pass the driving test.
25. She has plenty of money, but she is very mean.
-> Although she has plenty of money, she is very mean.
26. In spite of the fact that his vision is poor, he reads books.
-> In spite of his poor vision, he reads books.
27. Although Mr John is famous, he's very humble.
-> As Mr John is famous, he's very humble.
28. The firefighters rescued the dog in the house although it was very dangerous.
-> Despite it being very dangerous, the firefighters rescued the dog in the house.
29. Though the weather was very cold, we went swimming last week.
-> In spite of the very cold weather, we went swimming last week.