Используйте специальную конструкцию it is (was) that (who) на выделенных словах жирным шрифтом. model: i met him in moscow in 1990. 1. it was in 1990 that i met him. 2. it was in moscow that i met him. 3. it was he whom i met in moscow in 1990. 1. last year his friend took up history as his future speciality (3). 2. my teacher advised me to enter the history faculty when i was leaving school (2). 3. the country was proclaimed a republic as a resut of the revolution (1). 4. i have a special liking for ethnography (1). 5. we passed over to the study of ancient greece after we were through with the study of ancient rome (1). 6. she didnot attend classes because she was taken ill (1). 7. in two years i am going to major in ancient languages. (2)

1) It was last year that his friend took up history as his future speciality.
    It was his friend whom took up history as his future speciality last year
    It was history that his friend took up as his future speciality last year
2) It was my teacher who advised me to enter the History Faculty when I was leaving school
    It was when I was leaving school that my teacher advised me to enter the History Faculty 
3) It was the revolution that the country was proclaimed a republic as a result of
4) It is ethnography that I have a special liking for
5) It was after we were through with the study of ancient Rome that we passed over to the study of ancient Greece
6) It was because she was taken ill that she didnot attend classes
7) It is in two years that I am going to major in ancient languages
    It is ancient languages that I am going to major in in two years