Аскройте скобки, чтобы получить present perfect или past simple. i … (do) this exercise before. i … (do) this exercise tw0 minutes ago. we … (go) to school since the first form. we … (go) to school yesterday. you … ( see) a horse last week. you … (never/ see) a horse. he … (just/say) that. he … (say) that a minute ago. they … (already/ have) breakfast. they … ( have) breakfast at 2 o’clock.