Put in the prepositions where it is necessary. One
preposition is extra.
at of for in against to by on
1. Germany began the war without declaring it ... Russia.
2. The Bill ... Rights guarantees to people some important rights.
3. Judging ... his words he is the best football player.
4. A new Bill ... education was passed in the USA.
5. They fought ... peace.
6. Some congressmen voted ... the rule.
7. He judged ... the competition.​

i have many hobbies because there are many interesting things to do. unfortunately i don't have much spare time as i'm going to be a student. that's why i have to study a lot. i like doing different things: such as reading detective stories, listening to the music, playing tennis with my classmates. but my favorite hobby is solving crossword puzzles. it's not only interesting, but also very useful. when you try to solve the puzzle you find out and learn a lot of different facts. because in puzzles there are questions about famous people, geographical places, countries, scientific achievements and so on. you also train your brain. the crosswords are published in newspapers and magazines and there are special newspapers that contain only crosswords. i sometimes try to make up my own puzzle and i can say that it is not less interesting. all the members of our family like to take part in solving the puzzles and this unites us very much.

The population of the earth grows uncontrolled rate, and the number of animals decreased dramatically. under the threat of becoming extinct 21% of mammals, 30% of amphibians, 12% of birds, 17% of sharks and 27% of the corals. we lose biodiversity at an unprecedented pace in the history. the reasons are the same: environmental degradation, deforestation of the amazon, the decrease in volumes of fresh water in lakes, as well as the destruction of coral reef ecosystems. in the red book are: long-eared jerboa, japanese hare, golden лангур, the spanish lynx, orangutan, chinese lizard, pygmy hippopotamus, elephant turtle, owl parrot and others. take care of endangered animals!