14. In the past few years, it (become)............................... more and more difficult to get into university. 15. This book is so long that I (not finish).............................................. it yet. 16. I (like)................ cowboy movie since I was a child.  17. I'll come and see you before I (leave).................... for the United States. 18. We (have).................... four tests so far this semester. 19. As soon as Martina saw the fire, she (phone).................... the fire department. 20. I saw Lisa at the station when I (go)............. to work this morning but she (not/ see)................. me. 21. I (study).................... at Le Hong Phong high school from 1998 to 2001. 22. We (not see)................... Jack for a long time. It's twenty years since we last (see).................... him. 23. My brother (work).................... as a travel agent for ten years now. 24. The children (play).................... happily in the park when I found them. 25. (Bill/ arrive)................. home yet? - Yes. He (arrive)................. three hours ago. 26. I (know).............................. Jim Bates since he (be)............................... ten years old. 27. He will take a dog out for a walk as soon as he (finish).................... his work. 28. We (not see).................... Marta recently. The last time we (meet).................... her was in April. 29. Kathy usually (sit)............. in the front row during class, but today she (sit).............. in the last row. 30. A: Look! It (snow).................................................... . B: It's beautiful! This is the first time I (ever/ see) ................. snow. It (not snow)........... in my country