时态语态专项练习 1.Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology. A. begin B. began C. have begun D. had begun 2. Turn on the television or open a magazine and you ________ advertisements showing happy families. A. will often see B. often see C. are often seeing D. have often seen 3. — 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 left C. has left D. left 4. — What were you doing when Tony phoned you? — I had just finished my work and________ to take a shower. A. had started B. started C. have started D. was starting5. I ________ you not to move my dictionary—now I can’t find it. A. asked B. ask C. was asking D. had asked 6. —Has Sam finished his homework today? —I have no idea. He ________ it this morning. A. did B. has done C. was doing D. had done 7. —What’s that terrible noise? —The neighbors ________ for a party. A. have prepared B. are preparing C. prepare D. will prepare 8. Now that she is out of a job, Lucy ________ going back to school, but she hasn’t 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. were C. had been D. would be 10. The discussion ________ alive when an interesting topic was brought in. A. was coming B. had come C. has come D. came 16. She has set a new record, that is, the sales of her latest book ________ 50 million. A. have reached B. has reached C. are reaching D. had reached 17. He kept looking at her, wondering whether he ________ her somewhere. A. saw B. has seen C. sees D. had seen 18. The crazy fans ________ patiently for two hours and they would wait till the movie star arrived. A. were waiting B. had been waiting C. had waited D. would wait 19. She ________ her hairstyle in her hometown before she came to Chongqing for a better job. A. would change B. has changed C. changed D. was changing 20. The first use of atomic weapons was in 1945, and their power ________ increased enormously ever since. A. is B. was C. has been D. had been