Напишите следующие предложения во множественном, числе : 1. we translated this article at our english lessons. 2. summer wasn't very hot in that part of the country. 3. will he present this paper to a physical journal? 4. take that book off the table. 5. this alloy is very hard.

1. We translated these articles at our English lessons.
2. Summers weren't very hot in those parts of the countries.
3. Will they present those papers to physical journals?
4. Take those books off the tables.
5. These alloys are very hard.