Sure! Here’s how you can complete the passage:

1. **a. interested**
2. **b. eager**
3. **c. up**
4. **d. completely**
5. **e. rather**
6. **f. a**
7. **g. better**
8. **h. accept**
9. **i. causing**
10. **j. however**
11. **k. difficulties**
12. **l. differences**
13. **m. challenges**
14. **n. likely**
15. **o. less**

If you have any specific parts of the passage you want help with, feel free to share!