Заполните пропуски соответствующей формой глагола to be. 1. a group of students … at work in our laboratory. 2. i … a student of economics several years ago. 3. in winter the weather …often cold in our country. 4. these computers … very reliable. 5. you … the best specialist in our department last year
2 was
3 is
4 are
5 were