1. Sales of CDs have greatly increased since the early 1990s, when people _ to enjoy the advantages of this new technology. A. begin B. beganC. have begun D. had begun2. Turn on the television or open a magazine and you _ advertisements showing happy families.A. will often see B. often seeC. are often seeing D. have often seen3. I hear Jane has gone to the Holy Island for her holiday. Oh, how nice! Do you know when she _? A. was leaving B. had leftC. has left D. left4. What were you doing when Tony phoned you?I had just finished my work and_ to take a shower. A. had started B. startedC. have started D. was starting5. I _ you not to move my dictionarynow I cant find it.A. asked B. askC. was asking D. had asked6. Has Sam finished his homework today?I have no idea. He _ it this morning. A. did B. has doneC. was doing D. had done7. Whats that terrible noise? The neighbors _ for a party. A. have prepared B. are preparingC. prepare D. will prepare 8. Now that she is out of a job, Lucy _ going back to school, but she hasnt decided yet.A. had considered B. has been considering C. considered D. is going to consider 9. The teacher, with 6 girls and 8 boys of her class, _ visiting a museum when the earthquake struck. A. was B. wereC. had been D. would be 10. The discussion _ alive when an interesting topic was brought in. A. was coming B. had comeC. has come D. came11. Because the shop _ , all the T-shirts are sold at half price. A. has closed down B. closed downC. is closing down D. had closed down12. Lets keep to the point or we _ any decisions. A. will never reach B. have never reached C. never reach D. never reached13. My mind wasnt on what he was saying so Im afraid I _ half of it. A. was missing B. had missedC. will miss D. missed14. It is said in the book that Thomas Edison (18471931) _ the world-leading inventor for sixty years. A. would be B. has beenC. had been D. was15. You were out when I dropped in at your house. Oh, I _ for a friend from England at the airport. A. was waiting B. had waitedC. am waiting D. has waited 16. She has set a new record, that is, the sales of her latest book _ 50 million.A. have reached B. has reachedC. are reaching D. had reached17. He kept looking at her, wondering whether he _ her somewhere. A. saw B. has seenC. sees D. had seen18. The crazy fans _ patiently for two hours and they would wait till the movie star arrived。A. were waiting B. had been waitingC. had waited D. would wait19. She _ her hairstyle in her hometown before she came to Chongqing for a better job. A. would change B. has changedC. changed D. was changing20. The first use of atomic weapons was in 1945, and their power _ increased enormously ever since. A. is B. wasC. has been D. had been21. You havent said a word about my new coat, Brenda. Do you like it?Im sorry I _ anything about it sooner. I certainly think its pretty on you. A. wasnt saying B. dont sayC. wont say D. didnt say22. All morning as she waited for the medical report from the doctor, her nervousness _. A. has grown B. is growingC. grew D. had grown23. Why dont you put the meat in the fridge? It will _ fresh for several days. A. be stayed B. stayC. be staying D. have stayed24. How can you possibly miss the news? It _ on TV all day long. A. has been B. had beenC. was D. will be 25. Sorry to have interrupted you. Please go on. Where was I? You _ you didnt like your fathers job. A. had said B. saidC. were saying D. had been saying26. I arrived late; I _ the road to be so icy.A. wouldnt expect B. havent expectedC. hadnt expected D. wasnt expecti