单项选择。 1. — What were you doing when I called you at 8 o ’ clock yesterday? — I _____ the violin at that time. A. was playing B. is playing C. played 2. It _______ heavily when I left the cinema. A. rains B. was raining C. is raining 3. I ______ my clothes, and the phone rang. A. was washing B. washed C. am washing 4. My brother came back home while I ______ homework. A. am doing B. were doing C. was doing 5. — Did you watch the football match yesterday? — Yes, I did. You know, my brother _____ in the match. A. is playing B. was playing C. will play 6. I ____ the charity show on TV when the telephone rang. A. was watching B. watched C. am watching 7. Peter likes reading a newspaper _____ he is having breakfast. A. until B. while C. because 8. Look at the timetable. Hurry up! Flight 4206 ____ at 18:20. A. takes off B. took off C. will be taken off 9. Listening is just as ____ as speaking in language learning. A. importan t B. more important C. most important 10.While the boy _____ down the street, the UFO landed. A. had walked B. was walking C. is walking