1. hasn't arrived; 2. have studied; 3. never has been; 4. Did you do; 5. We have already had; 6. took; 7. has failed; 8. was; 9. went; 10. hasn't tell; 11. haven't do; 12. Have you read.
Объяснение:
1. hasn't arrived; 2. have studied; 3. never has been; 4. Did you do; 5. We have already had; 6. took; 7. has failed; 8. was; 9. went; 10. hasn't tell; 11. haven't do; 12. Have you read.
Объяснение: