Respuesta :

3. has gone
4. has gone
5. have forgot
6. had forgotten
7. had had
8. has to be
9. have not finished 
10. has just gone
11. have arrested
12. had given; have lost
13. must be; has dissappered 
14. have improved


3. right
4. right
5. wrong: was
6. right
7. wrong: got
8. wrong: were you born
9. right
10. wrong: was; developed
13.2

3 went

4 has gone/'s gone

5 have forgotten/'ve forgotten

6 forgot

7 had

8 has been/'s been

9 haven't finished

10 has just gone/'s just gone

11 arrested

12 gave ... lost or have lost/'ve lost

13 was ... has disappeared/'s disappeared

14 have improved/'ve improved

13.3

3 wrong--did Shakespeare write

4 right

5 wrong--was

6 right

7 wrong--My grandparents got married.

8 wrong--were you born

9 right

10 wrong--was the scientist who developed.

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