Here are the best answers for each of the sentences:

1. **A. Should she**
2. **B. would listen**
3. **C. should**
4. **A. shines - will go**
5. **C. wouldn’t have been cancelled - hadn’t rained**
6. **B. would never be**
7. **A. leave - will have**
8. **B. is/ will know**
9. **B. studied**
10. **D. whether - or**
11. **A. if - for**
12. **B. If I were you**
13. **C. If I were you**
14. **A. vaporizes**
15. **C. or**

Feel free to ask if you have any other questions!