1. obstacle

答案 1
2. access

答案 2
3. ample

答案 3
4. co-sponsor

答案 4
5. reclaim

答案 5
6. promise

答案 6
7. vital

答案 7
8. solution

答案 8
9. foundation

答案 9
10. achieve

答案 10

正确答案是：1. obstacle → something that stands in the way, 2. access → the right to obtain or make use of, 3. ample → more than enough, 4. co-sponsor → sponsor together, 5. reclaim → claim back, 6. promise → grounds for feeling hopeful about the future, 7. vital → urgently needed; absolutely necessary, 8. solution → a method for solving a problem, 9. foundation → the basis on which something is grounded, 10. achieve → to gain with effort