Number 5
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) dreamed 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) tried to reach the top, but nobody (succeed, ever) has ever succeeded. The climb is extremely difficult and many people (die) died trying to reach the summit.

15. I (visit, never) have never visited Africa, but I (travel) have traveled 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.

Number 6
Since computers were first introduced to the public in the early 1980's, technology (change) has changed a great deal. The first computers (be) were simple machines designed for basic tasks. They (have, not) didn't have much memory and they (be, not) weren't very powerful. Early computers were often quite expensive and customers often (pay) paid thousands of dollars for machines which actually (do) did very little. Most computers (be) were separate, individual machines used mostly as expensive typewriters or for playing games.

Times (change) have changed. Computers (become) have become powerful machines with very practical applications. Programmers (create) have created a large selection of useful programs which do everything from teaching foreign languages to bookkeeping. We are still playing video games, but today's games (become) have become faster, more exciting interactive adventures. Many computer users (get, also) have also got on the Internet and (begin) have begun communicating with other computer users around the world. We (start) have started to create international communities online. In short, the simple, individual machines of the past (evolve) have evolved into an international World Wide Web of knowledge.

Number 7
Robin: I think the waiter (forget) has forgotten us. We (wait) have been waiting here for over half an hour and nobody (take) has taken our order yet.

Michele: I think you're right. He (walk) has walked by us at least twenty times. He probably thinks we (order, already) have already ordered.

Robin: Look at that couple over there, they (be, only) have only been here for five or ten minutes and they already have their food.

Michele: He must realize we (order, not) haven't ordered yet! We (sit) have been sitting here for over half an hour staring at him.

Robin: I don't know if he (notice, even) has even noticed us. He (run) has been running from table to table taking orders and serving food.

Michele: That's true, and he (look, not) hasn't looked in our direction once.
Number 8
1. Judy: How long (be) have you been in Canada?
Claude: I (study) have been studying here for more than three years.

2. I (have) have had the same car for more than ten years. I'm thinking about buying a new one.

3. I (love) have loved chocolate since I was a child. You might even call me a "chocoholic."

4. Matt and Sarah (have) have been having some difficulties in their relationship lately, so they (go) have been going to a marriage counselor. I hope they work everything out.

5. John (work) has been working for the government since he graduated from Harvard University. Until recently, he (enjoy) has enjoyed his work, but now he is talking about retiring.

6. Lately, I (think) have thought about changing my career because I (become) have become dissatisfied with the conditions at my company.

7. I (see) have been seeing Judy for more than five years and during that time I (see) have seen many changes in her personality.