các bạn giải thích giùm mình vì sao trả lời câu hỏi này nha 1. I’ve understood/ I understand biology a lot better now that we've got a new teacher. 2. I went/ had gone to see a Formular One race last week, but I admit/ I’m admitting that I don't know much about cars. 3. Do you find/ Have you found it difficult to concentrate on your work with this music on? 4. We’ll do/ We do our best to get the computer repaired by next week, but we won't guarantee/ we don't guarantee it. 5. I've just started/ I just started to learn how to drive. Now I'm knowing/ I know how difficult it is. 6. She says that she wasn't in the kitchen when the bottle was smashed / smashed, but I refuse/ I'm refusing to believe her. 7. I'm certainly agreeing/ I certainly agree with you that people shouldn't drink and drive. 8. I know the company made/ has made a loss this year, But I won't apologize/ I don't apologize for that. 9. It's very difficult for us to get jobs here, so we're considering/ we consider emigrating to Canada. 10. Since I has won / won the lottery, my telephone didn't stop/ hasn’t stopped ringing. People phone/ are phoning to ask how I spend / I'm going to spend the money. 11. In tonight's World Cup match, France currently beat / are currently beating Germany 2-1 with five minute of the match to go. If the score remains/ is remained the same it will be the first time Germany lost/ have lost to France since 1998. 12. Beckham passes/ is passing to Giggs who shoots/ is shooting just over the bar. Manchester United attack/ are attacking much more in this half... 13. She goes/ She's going up to this man and looks/ looking straight into his eyes. He's not wearing/ He doesn't wear his glasses, and he's not recognizing/ he doesn't recognize her... 14. I have gone/ went to a concert yesterday in the Town Hall. In the middle of it, while the orchestra played/ was playing a man suddenly was standing/ stood on his seat and starting/ started to conduct them... 15. This man plays/ is playing golf when a kangaroo bounds/ is bounding up to him, grabs/ grabing his club and hits/ hitting his ball about half a mile... V. Complete the sentence using these pair of verbs. Use the past simple or past progressive. come - show; get - go; break - ski; live - spend; look- see; look - slip; start - check in; add - taste; go off - light; not listen - explain; push - run; write - drive; shut - start; come - put; take - place . 1. The smoke alarm went off when he lit neath it. 2. Just as I was getting into the bath all the light went off. 3. When I was living/ lived in Paris, I spent three hours a day traveling to and from work. 4. She added more salt to the soup, and then it tasted much better. 5. Helen broke her leg while she was skiing in Switzerland. 6. When the taxi came I put my suitcase on the back seat. 7. A friendly American couple started chatting to him as he was checking in at the hotel reception. 8. I bumped into Mary last week. She was looking a lot better than when I last for her. 9. It was an amazing coincidence. Just as I was writing to Anne, she was driving to my house to come and see me 10. I shut the windows as soon as it started to rain. 11. My boss came into the office just as I was showing everyone my holiday photos. 12. He took the cake out of the oven and placed it carefully on the table 13. When his mother was looking in the other direction Steve slipped away quietly. 14. She pushed open the door and ran into the room. 15. I can't remember how to answer this question. I must confess that I didn’t listen/ wasn’t listening while the teacher was explaining it to us. VI. Complete these sentences using the verb given. Use the past simple or the past perfect. 1. As Geoff was introduced to Mrs Snape, he realized (realize) that he had met (meet) her before. 2. During the previous week, I went (go) to the gym every morning. 3. By the time I got (get) back to the bathroom, the bath had overflowed (overflow). 4. The boy told me that he had lost (lose) his train ticket and didn’t know (not/ know) how he would get home. 5. I was just about to leave when I remembered (remember) my briefcase. 6. She walked (walk) into the station only to find that the train had left (leave). 7. At the conference, scientists reported that they had found (find) a cure for Malaria. 8. On my last visit to Wixton I found (find) that the village hadn’t changed (not change) much. 9. In a surprise move, the Prime Minister resigned (resign) last night. 10. Jane didn't want any dinner. She had eaten (eat) already. 11. When she came (come) into the hall, everyone started (start) cheering. 12. After they had eaten/ ate (eat) all the food, they picked (pick) up their bags and left. 13. I thought I would get to the restaurant first, but Jim had arrived (arrive) before me. 14. By the time I got (get) to the party, most people had gone (go) home. 15. As soon as I turned (turn) the ignition key, the engine caught (catch) fire