EX1: 
1. have been working
2. have completed
3. Have you called
4. has learning
5. have never heard
6. has been waiting 
EX2:
1. Q has been playing games on the computer for 2 hours.
2. His mother has been teaching Geography since 1990.
3. I attended his lectures twice, one in March and the other in May.
4. My father has been driving this car to work for a long time.
5. Mr. has been working on his laptop since 8.