Choose between the noun and the verb in brackets

and change the form if necessary.
1.The scientists (achievement/to achieve) more than they could ever hope for.
2,Our village shop couldn’t (competition/to compete) with the big supermarket which opened last year.
3,A lot of people believe that (knowledge/to know) should be shared and exchanged.
4,It’s important (information/to inform) people about the opportunities they have.
5,There is still no (solution/to solve) to a lot of global problems.