1. A. Has B. Was C. Had D. Is
2. A. Known B. Recognized C. Written D. Called
3. A. on B. In C. By D. For
4. A. Whose B. Who C. These D. Which
5. A. Wanted B. Made C. Started D. Missed
6. A. Until B. Whether C. While D. Though
7. A. Some B . The C. An D. That
8. One B. He C. They D. It
9. A. Than B. Therefore C. When D. Then
10. A. To B. As C. For D. So