8. Complete with: for or since. 1 He has been an actor ..... twenty years.

Let's fill in the blank with either "for" or "since." "For" is used to indicate a duration of time, while "since" is used to indicate a starting point in time. 1. He has been an actor for twenty years. *Explanation:* "Twenty years" is a duration of time, so we use "for." Развёрнутый ответ на русском языке: Мы используем "for", чтобы указать на продолжительность времени, а "since" - чтобы указать на начальную точку во времени. 1. "Twenty years" (двадцать лет) - это продолжительность времени, поэтому используем "for": He has been an actor for twenty years.