Please capitalize where necessary: your site doesn't have to be perfect.
A: Your site doesn't have to be perfect.

Please capitalize where necessary: he hopes that the main hall at the conference center will be completed during the next two months, and the work on the sidewalks, soccer fields, and playgrounds will be completed by the end of february.
A: He hopes that the main hall at the conference center will be completed during the next two months, and the work on the sidewalks, soccer fields, and playgrounds will be completed by the end of February.

Please capitalize where necessary: he married marie-louise bianconi in 1903 and they had four children, one of them henri cartan was to produce brilliant work in mathematics.
A: He married Marie-Louise Bianconi in 1903 and they had four children, one of them Henri Cartan was to produce brilliant work in mathematics.

Please capitalize where necessary: hotel le centenaire brussels expo is located a short distance from the famous atomium, on the grounds of the brussels...
A:
Hotel Le Centenaire Brussels Expo is located a short distance from the famous Atomium, on the grounds of the Brussels...