the solution was to uninstall WebDav?这里为什么多了个to?

the solution was to uninstall WebDav?这里为什么多了个to? He was happy with the solution to the problem.这里的with如何解释? It was the most reasonable solution to the health problem___ ______a solution to the technical problem,he was determined Jim was the first one( to come) to the party.为什么这里用to come?这 It was the most possible solution to the problem of water su Your computer was unable to download the solution at this ti 、Your computer was unable to download the solution at this t He was seen to go into the room 这里为什么SEEN后加TO 为什么这里不要还原to?I heard the boy singing just now.The boy was hea the solution of the problem和the solution to the problem哪个对? Did she say anything about how the work was to be done.为什么这里