Воды каких частей северной Америки пока мало загрязнены?

что продовали в ростово суздальском княжестве? и с кем торговали?

 4 Complete the sentences. Use: always, last year, usually, every Saturday, some years ago, often, every winter, yesterday, never, last Sunday, last summer, four weeks ago.
1. He is ... hungry.
2. You were busy ....
3. They are at home ....
4. He was in London ....
5. The Stone of Destiny was in Westminster Abbey ....
6. Misha and Robin were in Russia ....
7. They were our friends ....
8. She was interested in horse riding ....
9. He is ... late.
10. It is ... cold.
11. He ... has orange juice for breakfast. He doesn't like it.
12. We ... play together.
13. His birthday was ....

в арифметической прогрессии -1/4;-1/5 найдите количество отрицательных членов