Question

11. They …….tea when the doorbell …….. A. have/is ringing B. were having/rang C. had had/ rang D. having/ringing 12. Father ……his pipe while mother ……a magazine. A. smoked/read C. had smoked/read B. was smoking/was reading D. smoking/reading 13. When I …..into the office, my boss ……for me. A. came/was waiting B. was coming/waited C. had come/waited D. came/waiting 14. When I ……John, he ……across the road. A. see/ walks B. see/was walking C. saw/was walking D. saw/is walking 15. When he ……, we …… dinner. A. arrived/having B. arrived/were having C. was arriving/had D. had arrived/had 16. While they ……chess, we …….the shopping. A. playing/doing B. were playing/doing C. played/did D. were playing/were doing 17. They …….football when the lights in the stadium ……out. A. were playing/went B. played/was going C. were playing/ was going D. playing/went 18. While George and John …..their room, she ……the ironing. A. cleaning/doing B. were cleaning/was doing C. were cleaning/doing D. cleaning/was doing 19. While I ……TV last night, a mouse ran across the floor. A. watch B. watched C. was watching D. am watching 20. While George and John …..their room, she …….the ironing. A. cleaning/doing B. were cleaning/was doing C. were cleaning/doing D. cleaning/was doing

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Answer 1

11. They …….tea when the doorbell …….. A. have/is ringing B. were having/rang C. had had/ rang D. having/ringing

Một hành động đang xảy ra thì có một hành động khác chèn vào < QKTD_ QKĐ >

12. Father ……his pipe while mother ……a magazine. A. smoked/read C. had smoked/read B. was smoking/was reading D. smoking/reading => Hai hđ đag xảy ra song song đồng thời trong quá khứ

13. When I …..into the office, my boss ……for me. A. came/was waiting B. was coming/waited C. had come/waited D. came/waiting

14. When I ……John, he ……across the road. A. see/ walks B. see/was walking C. saw/was walking D. saw/is walking

15. When he ……, we …… dinner. A. arrived/having B. arrived/were having C. was arriving/had D. had arrived/had

16. While they ……chess, we …….the shopping. A. playing/doing B. were playing/doing C. played/did D. were playing/were doing

17. They …….football when the lights in the stadium ……out. A. were playing/went B. played/was going C. were playing/ was going D. playing/went

18. While George and John …..their room, she ……the ironing. A. cleaning/doing B. were cleaning/was doing C. were cleaning/doing D. cleaning/was doing

19. While I ……TV last night, a mouse ran across the floor. A. watch B. watched C. was watching D. am watching

20. While George and John …..their room, she …….the ironing. A. cleaning/doing B. were cleaning/was doing C. were cleaning/doing D. cleaning/was doing