1. was having, ring, came, was
2. did not read
3. have you put
4. have you been
5. has been
6. were walking, asked, could
7. was keeping
8. were talking
9. had, spoilt
10. came, opened, said, is happening, am
11. were eating, drinking, smiled, said, have you enjoyed the book
12 wrote, is returning
13 is gone off
14 was looking, was walking
15 are looking, are having