1) This road is often used by people.
2) Geography was had in the first year. (хотя я не уверенна, что это правильно. Не думаю, что такое предложение вообще можно в Passive Voice использовать, но ладно) (если что, есть другой вариант. Geography was taken in the first year (География была взята в первый год), просто он корректнее звучит...)
3) Some flowers were given me for my birthday by my friend.
4) The windows were broken when football were being played. (или The windows were broken when they were playing football)
5) The walls were painted but the doors weren't painted.
6) The library was cleaned by the workers.