1. The bill has been paid in the Intalia restaurant.

2.A hamburger has been eaten for some minutes (by me).

3. Jennifer's bicycle has been ridden in five miles the main street (by her). 

4. The presents have been already opened (by me).

5. The book hasn't been read (by them) since they were in the summer. 

6. The parcel has just been sent in the post office by Lan for some hours. 

7. I haven't been driven to the airpot by anyone.

8. The singer has been sent many gifts by people since last week.

9. The stories have been told by Mary recently.

10.Has the lesson been introduced by the teacher ?