Giải thích tại sao chọn 1. When he ...... into the office, the secretary a crosswords puzzle. A. came/ was doing B. was coming/ was doing C. was coming/ did D. came/ did 22. Why ... to me while I .... ? A. did you not listen/ was speaking B. were you not listening/ was speaking C. were you not listening/ spoke D. did you not listen/ spoke 3. While I..... for him to call up, he ....a good time in the bar. A. waited/ was having B. have waited/ was having C. was waiting/ have had D. was waiting/ was having 4. They this film lately. A. have seen B. saw C. have been seeing D. were seeing 5. She the picture when I came. A. painted B. has painted C. was painting D. have been 6. She a bath at seven o’clock last night. A. was having B. had C. has had D. has been having 7. She dishes already. A. was washing B. washed C. has washed D. has been washing 8. They supper when the telephone rang. A. had B. have had C. were having D. have been having 9. I you for ages. A. didn’t meet B. haven’t met C. was not meeting D. haven’t been meeting 10. Last summer he to Ha Long Bay. A. has gone B. was going C. went D. has been going