. Choose the correct form of the verb. 1. The businessmen (are/ have been) at the talks for two hours. 2. What (did you do/ have you done) last night? 3. I (went/ have been) to many countries in my life. 4. How long (does he know/ has he known) Mr. Blake? 5. He (went/ has been) to Greece two years ago. 6. When (have you come/ did you came) here? 7. (Have you written/ Did you write) a letter to Mr. White yet?