1. In the world, there **are** only 14 mountains that **reach** above 8,000 meters.
2. He sometimes **comes** to see his parents.
3. When I **came**, she **had left** for Da Lat ten minutes ago.
4. My grandfather never **flies** in an airplane, and he has no intention of ever doing so.
5. We just **decided** that we **would undertake** the job.
6. He told me that he **was taking** a trip to California the following week.
7. I knew that this road **was** too narrow.
8. Right now I **am attending** class. Yesterday at this time I **was attending** class.
9. Tomorrow I'm going to leave for home. When I **arrive**, at the airport, Mary **will be waiting** for me.
10. Margaret was born in 1950. By the year 2005, she **will have lived** on this earth for 55 years.
11. The traffic was very heavy. By the time I **got** to Mary's party, everyone already **had arrived**.
12. I will graduate in June. I **will see** you in July. By the time I **see** you, I **will have graduated**.
13. I **visited** my uncle's home many times when I **was** a child.
14. That book **has been lying** on the table for a week. You **haven't read** it yet?
15. David **is washing** his hands. He just **repaired** the TV set.
16. You **have been** here before? Yes, I **spent** my holidays here last year.
17. We never **met** him. We don't know what he **looks** like.
18. The car **will be** ready for him by the time he **comes** tomorrow.
19. On arriving at home I **found** that she just **had left** a few minutes before.
20. When we **arrive** in London tonight, it probably **will be raining**.
21. It **is raining** hard. We can't do anything until it **stops**.
22. Last night we **were watching** TV when the power **failed**.
23. That evening we **stayed** up to talk about the town where he **had lived** for some years.
24. I **sat** down for a rest while the shoes **were being repaired**.
25. Halfway to the office Paul **turned** round and **went** back home because he **had forgotten** to turn the gas off.
26. London **has changed** a lot since we first **came** to live here.
27. While we **were talking** on the phone the children **started** fighting and **broke** a window.
28. He used to talk to us for hours about all the interesting things he **had done** in his life.
29. You know she **has been standing** looking at that picture for the last twenty minutes.
30. I **have spent** a lot of time traveling since I **got** this new job.
31. When I **was** at school we all **studied** Latin.
32. When I **met** him, he **was working** as a waiter for a year or so.
33. After he **finished** breakfast he **sat** down to write some letters.
34. She **has had** a hard life, but she's always smiling.
35. I think Jim **will be** out of town.