I.
1. were - wouldn't be
2. hadn't been
3. had
4. said - hasn't phoned
5. came - had finished
6. went
7. were - to come
8. wouldn't be
9. comes - will have finished
10. going - had asked
II.
1. behavior
2. humorous
3. entertaining
4. harmful
5. collector
III.
1. would have → had
2. that → which
3. building → built
4. having → have
5. but → Ф
IV.
1. He suggested using fewer plastic bags.
