Exercise 1: Choose the best answer to complete each of the following sentences. 1. She came into the room while they ________ television A. watched B. have watched C. are watching D. were watching 2. I _________ a headache since yesterday. A. had B. was having C. have had D. would have 3. The teacher _________ into the room. A. has still come B. has already come C. has yet come D. has recently come 4. When he failed to meet us, we __________ without him. A. left B. would leave C. was leaving D. has left 5. He ___________ book the tickets, but he had no time to call at the cinema. A. would B. will C. is going to D. was going to 6. Peter has been trying for an hour, but his car still ___________ start. A. won't B. wouldn't C. didn't D. hasn't 7. It's an hour since he _________, so he must be at the office now. A. is leaving B. was leaving C. has left D. left 8. Most students _______ hard for the last few weeks. A. were working B. worked C. are working D. have been working 9. He ________ up his mind yet. A. didn't make B. hasn't made C. wasn't made D. wasn't making 10. The baby ________ non-stop for the last two hours. A. cried B. was crying C. is crying D. has been crying Exercise 2: Choose the best answer to complete each of the following sentences. 1. The girl weeps whenever she ________ such a story. A. hears B. has heard C. will hear D. heard 2. As soon as we ________ this new apartment, we ________. A. are finding-will move B. found-moved C. would find-move D. find-would move 3. My teacher arrived after we ________ for him for ten minutes. A. was waiting B. have waited C. had waited D. waited 4. This is the first time I _______ to play badminton. A. have tried B. am trying C. was trying D. would be trying 5. She _______here but she doesn't work here now. A. has worked B. had work C. used to work D. used to working 6. Jack went out, but he ________ anyone where he was going. A. doesn't tell B. not told C. wasn't telling D. didn't tell 7. London _________ the capital of the United Kingdom. A. is B. was C. will be D. is being 8. Someone _________ at the door. Can you hear it? A. knocks B. is knocking C. will knock D. was knocking 9. What are you cooking in that saucepan? It ________ good. A. smells B. is smelling C. smelled D. has smelled 10. I used to swim in this river when I _______ young A. am B. was C. will be D. have been giúp mk vs dc ko mk đang cần gấp lắm