Образуйте степени сравнения прилагательных и наречий

1) Letters have been posted by her.
2) My test has been already checked by teacher
3) All the windows have been opened by him
4) The present have been already bought by us
5) This exercise has been just done by me
6) The key has been already found by them
7) Dinner is being cooked by somebody
8) The vase has been broken by somebody when I came
9) The letter was being written by somebody at 5 o`clock
10)The table is being laied by them  at the moment
11) The chairs have been taken from the classroom by somebody
12) невозможно сделать пассив, возможно, предложение написано неверно
13) The fish had been caught by them befor we arrived

Around the deepest on the planet Lake Baikal - one of the largest sources of fresh water in the world - stretches fabulously beautiful Baikal zapovednik.Vokrug growing coniferous and deciduous forests, which are home to over 300 animal species and 80 plant species, about 25 of which are listed in the Red book. In the rivers of the Baikal nature reserve inhabited black grayling, goldilocks, burbot and lake Baikal taymen.V inhabits one of the three species of freshwater seals - seal, that says a lot about the quality of water in the lake: the seal in dirty water can not live. In the reserve there are predators: Wolverine, medvedi.Te who has ever been in the Baikal nature reserve, tell us about his wonderful influence on the mental state. If you walk along the tourist routes that penetrate the soul of the perfect state of mind and, and you return to the familiar bustle of the city has a completely different person.