Question

Answer 1

1 haven't seen

2 have you stayed

3 participated

4 will open

5 will go

6 have known

7 met

8 am going to tell

9 has worked

10 collected

Answer 2

1. haven't seen

2. have you stayed

3. participated

4. will open

5. has gone

6. have known

7. have met

8. am telling

9. has worked

10. collected