A
1. Has been issued
2. Correct
3. Has…been confirmed
4. Was invited
5. Was invented
6. Has been discussed
7. Correct
8. Was invaded
9. Correct
10. Being treated
11. Were showed
12. Is being
B
1. Were found
2. To be showed
3. Have been asked
4. To be given
5. Had been written
6. Is lit
7. Being allowed
8. To be met
9. Was made
10. To be known
C
1. To be caused
2. Are estimated
3. Has been reported
4. To have used
5. Is calculated
6. Are understood
7. To eat
8. Were meant
9. It
10. To be delivered
