1. David was fed up. He ______ for the bus for an hour. A. had been waiting B. waited C. has been waiting D. was waiting 2. There was a knock on the door while we ______ the game show on TV. A. were enjoying B. enjoyed C. had enjoyed D. had been enjoying 3. I wondered why he ______ his job. A. has changed B. changes C. used to change D. had changed 4. After I ______ lunch, I looked for my bag. A. had B. had had C. have had D. has had 5. He ______ on his English study all yesterday evening. A. used to work B. had worked C. was working D. working 6. It is years since I ______ Tina. A. have seen B. see C. had seen D. saw 7. I asked my father why he ______ to this city, but he couldn’t answer. A. moving B. had moved C. will move D. has moved 8. The phone ______ suddenly while Joanna was doing the housework. A. rang B. was ringing C. had rung D. is ringing 9. It ______ as we drove slowly along the road. A. has snowed B. had snowed C. was snowing D. is snowing 10. Peter left half an hour ago. He ______ for you for a long time then. A. was waiting B. has been waiting C. will be waiting D. had been waiting 11. The inspector noticed that not everyone ______ their safety helmet. A. was being worn B. will have worn C. was wearing D. wearing 12. John went to the post office to ask about his package but they kept saying that it ______ yet. A. doesn’t arrive B. hadn’t arrived C. is arriving D. was on the way 13. When the original star of the play ______ ill, Mary ______ an unexpected chance to play the leading role. A. fell - got B. has fallen - would get C. was falling - has got D. falls - has been getting 14. We ______ up the hill for half an hour when we realized we ______ in the direction of the castle. A. were walking - haven’t been going B. had been walking - weren’t going C. have been walking - didn’t go D. had walked - wouldn’t be going 15. Dan made a lot of friends while he ______ around America. A. was travelling B. has travelled C. will be travelling D. had travelled Giúp mình nha !!!