单项选择。 1. What _ __ you _ __ when she came in? A. did, do B. are, doing C. were ,doing 2. Where was David _ __ Linda was looking for him? A. that B. while C. at 3. _ __ TV at that time? A. Did you watched B. Have you watched C. Were you watching 4. My mother was cooking while I _ __ music. A. listened to B. have listened to C.was listening to 5. He _ __ his homework at home the whole morning last Sunday. A. does B. would do C.was doing 6. The news was very _ __ , and all of us were _ __ . A. surprised; surprising B. surprised; surprised C. surprising ; surprised 7.It was reported that nine Chinese people _ __ in a balloon crash(坠毁) in Egypt on February 26,2013. A. are killed B. were killed C. will kill 8. Li Na is _ __ famous _ __ all the tennis fans in China know her. A. too; to B. enough; to C. so; that 9. How I wish I could sleep longer! However, I had to get up as soon as the alarm clock _ __ . A. ran away B. took off C. went off 10. _ __ Mary is in poor health, _ __ she works hard. A. But; although B. But; / C. Although; / 11. The boy fell asleep _ __ he was listening to music. A. while B. after C. as 12. I’m _ __ building a new zoo because I think zoos are terrible places for animals to live in. A. on B. for C. against 13.We went to Hainan Island and had great fun _ __ in the sea. A. surf B. surfs C. surfing 14.During the past two years , several earthquakes _ __ in different places of the world. A. happen B. happened C. took place 15. I waited unit they all fell _ __ . A. asleep B. sleep C. sleepy