1. Brenda HAD BEEN WORKING here for a year before she left to go to the university.2. He WAS DRIVING to work at this time yesterday morning.3. I HAD already EATEN breakfast by the time the others WOKE UP .4. It HAD BEEN RAINING for the 2 days when suddenly the sun CAME OUT.5. They HAD already SEEN the film twice at the cinema when she RENTED it on video.6. The teacher TAUGHT the students how to use past tenses yesterday.7. The cousins WENT to the Crimea for their holidays last summer.8. They WERE PLAYING tennis on the sports ground when the weather changeD.9. After I had finished my homework, I LEFT the library.10. Everybody WAS DANCING it the hall when electricity suddenly WENT OFF.11. By the time he FOUND what he wanted he HAD SPENT all the money.12. A fire BROKE out) in a residence hall where the number of students WERE STAYING.