Exersice 8 : Present Perfect and Simple Past ( Page 65 )
1. John wrote his report last night.
2. Bob has seen this movie before.
3. Jorge has already read the newspaper.
4. Mr. Johnson has worked in the same place for thirty-five years, and he is not planning to retire yet.
5. We haven't begun to study for the test yet.
6. George has gone to the store at ten o'clock this morning.
7. Joan has traveled around the world.
8. Betty wrote a letter last night.
9. Guillermo called his employer yesterday.
10. We haven't seen this movie yet.