1. A: Did you like the movie "Star Wars?" 
B: I don't know. I (see, never)  have never seen  that movie. 
2. Sam (arrive)  arrived  in San Diego a week ago. 
3. My best friend and I (know)  have known  each other for over fifteen years. We still get together once a week. 
4. Stinson is a fantastic writer. He (write)  has written  ten very creative short stories in the last year. One day, he'll be as famous as Hemingway. 
5. I (have, not)  haven't had  this much fun since I (be)  was  a kid. 
6. Things (change)  have changed  a great deal at Coltech, Inc. When we first (start)  started  working here three years ago, the company (have, only)  only had  six employees. Since then, we (expand)  have expanded  to include more than 2000 full-time workers. 
7. I (tell)  told  him to stay on the path while he was hiking, but he (wander)  wandered  off into the forest and (be)  was  bitten by a snake. 
8. Listen Donna, I don't care if you (miss)  missed  the bus this morning. You (be)  have been  late to work too many times. You are fired! 
9. Sam is from Colorado, which is hundreds of miles from the coast, so he (see, never)  has never seen  the ocean. He should come with us to Miami. 
10. How sad! George (dream)  dreamt  of going to California before he died, but he didn't make it. He (see, never)  never saw  the ocean.
11. In the last hundred years, traveling (become)  has become  much easier and very comfortable. In the 19th century, it (take)  took  two or three months to cross North America by covered wagon. The trip (be)  was  very rough and often dangerous. Things (change)  have changed  a great deal in the last hundred and fifty years. Now you can fly from New York to Los Angeles in a matter of hours. 
12. Jonny, I can't believe how much you (change)  have changed  since the last time I (see)  saw  you. You (grow)  have grown  at least a foot! 
13. This tree (be)  was  planted by the settlers who (found)  founded  our city over four hundred years ago. 

14. This mountain (be, never)  has never been  climbed by anyone. Several mountaineers (try)  have tried  to reach the top, but nobody (succeed, ever)  has ever succeeded. The climb is extremely difficult and many people (die)  have died  trying to reach the summit. 
15. I (visit, never)  have never visited  Africa, but I (travel)  have travelled  to South America several times. The last time I (go)  went  to South America, I (visit)visited  Brazil and Peru. I (spend)  spent  two weeks in the Amazon, (hike)  hiked  for a week near Machu Picchu, and (fly)  flew  over the Nazca Lines