16. They________for a mile when they___________that someone___________missing. A. Had walked/ had realized/ was B. had been walking/ realized/ had been C. had been walking/ realized/ was D. had walked/ had realized/ had been 17. As part of my job, I_________ abroad a lot, so I_______ to improve my English. A. Travel/ need B. am travelling/ need C. am travelling/ am needing D. travel/ am needing 18. I_________ at my mother's house this week because I__________ my house painted. A. Sleep/ have B. am sleeping/ have C. sleep/ am having D. am sleeping/ am having 19. I ____you should buy him a tie. He___________to dress formally. A. Am thinking/ likes B. think/likes C. think/ is liking D. am thinking/ has liked 20. As a teenager, I_________ things my parents__________ of. A. Would do/ didn't approve B. used to do/ weren't approving C. used to do/ didn't approve D. would do/ weren't approving 21. "Hurry up! We're waiting for you. What's taking you so long?" "I________ for an important phone call. Go ahead and leave without me." A. Wait B. will wait C. am waiting D. have waited 22. Robert is going to be famous some day. He_________in three movies already. ~ I'm sure he'll be a star. A. Has been appearing B. had appeared C. has appeared D. appeared 23. Where's Polly? ~She_________. A. Is in her room studying B. in her room is studying C. studies in her room D. has in her room studied 24. Hello? Alice? This is Jeff. How are you? ~ Jeff? What a coincidence! I_________ about you when the phone rang. A. Was just thinking B. just thought C. have just been thinking D. was just thought 25. What___________ about the new simplified tax? ~It's more confusing than the old one. A. Are you thinking B. do you think C. have you thought D. have you been thinking 26. When is Mr. Fields planning to retire? ~ Soon, I think. He________ here for a long time. He'll probably retire next year or the year after that.