Fill in the blanks with the correct forms of the verbs be or have:
1. Their son … a businessman. 2. He … a disk. 3. These boys … students. 4. Much time … often spent by my relatives together. 5. My friends will … introduced to my parents by me tomorrow. 6. The museum … visited by them last Sunday. 7. The examinations … seldom passed by him well. 8. The library … rarely visited by the students last year. 9. The cake was … cooked by my mother all evening yesterday. 10. The man … waiting for her at the moment. 11. She … finished her work when we came in. 12. I … never been to the USA. 13. He … already read this book. 14. She … just met her husband. 15. They … not translated this text yet.