Răspuns:
ex.1
2. have been
3. haven't
4. what are you doing? I'm thinking...
5. have smoked
6. seems
7. has been seeing
8. works...rises
ex.2
2. has gone to
3. have been in
4. have been to
5. have gone to
ex.3
2. works
3. works
4. is supervising
5. involves
6. enjoys
7. wishes
8. is predicted
9. misses
10. happens
