(기초영작문) '해결'에 관련되는 전치사 to : key to~; road to~; answer to~; solution to~

~에 대한 열쇠 :
the key to his business success
the key to the back door

~로 가는 길 :
the road to true peace and prosperity in our country
the road to freedom
the road to arms control
the road to economic recovery (경제회복으로 가는 길)

~에 대한 답 :
The answer to your question is very simple.
A bank loan seemed like the answer to all our problems.
The only answer to this question

~에 대한 해결책 :
This is the only solution to the problem.
A solution to the problem now seems in sight. (그 문제에 대한 해결책이 이제 눈에 보이는 것 같다.)
A solution to the oil crisis
The best solution to insomnia (불면증에 대한 최고의 해결책)