Here are the correct answers based on the context provided:

1. **A. on account of**
2. **D. due to**
3. **B. and**
4. **D. so**
5. **B. Because of**
6. **A. Because of the noise**
7. **D. in spite of the noise music**
8. **A. because**
9. **C. not practicing**
10. **D. practice**
11. **B. due to**
12. **C. Because**
13. **A. Since**
14. **B. owing to**
15. **D. now that**
16. **B. owing to an injuring leg**
17. **A. on account of**
18. **A. inasmuch as**
19. **D. Seeing as**
20. **C. Since**

Feel free to ask if you need further assistance or explanations!