Ex 2:

1.has seen

2.has lent

3.has just passed

4.has studied

5.has already told

6.hasn't taken

7.has read

8.haven't begun

9.have been

10.has wore

Ex 3:

1.haven't seen

2.haven;t contacted

3.have-studied

4.have-seen

5.have never seen

6.were-have been

7.have seen

8.has lost

9.hasn't finished

10.hasn't seen

Ex 4:

1.have lived

2.has just seen

3.have already shown

4.have just sold

5.have been

6.has used

7.have lived

8.has taught

9.hasn't spoken

10.has worked

Ex2

1. has seen

2. has lent

3. has just passed

4. has been studying

5. has already told

6. hasn't taken

7. has read

8. haven't begun

9. have been

10. has worn

Ex3

1. haven't seen

2. haven't contacted

3. have (you) studied

4. have (you) seen

5. have never seen

6. are / have been 

7. have seen

8. has lost

9. hasn't finished

10. hasn't seen

Ex4 

1. have lived

2. has just seen

3. have already shown

4. have just sold 

5. have been

6. has used

7. have lived

8. has taught

9. hasn't spoken

10. has worked