Đáp án : 

17. What did Hoa (try)...try...on yesterday?

18. Who (talk)...did talk...to about the film on TV last Monday?

19.Where did they ( stop)...stop...on their way back last Sunday?

20. What did the student (wear) ...wear...at school two years ago?

21. Where did you (put) ...put... the cake yesterday?

22. What time did you (leave )....leave...home for school yesterday?

23. What did Ba(receive)..receive....from Liz last week?

24. How long did he (do)..do........this hat yesterday?

25. What time did you (go)...go.....to bed last night?

26. Did you (go) ....go....to Dalat for last tet vacation?

27. Did he (have) ...have.....a lot of friends in Ho Chi Minh city 3 years ago?

28. Did his uncle (take).....take.....him to see Tri Nguyen aquarium last week?

29. Did Liz (buy)....buy..... a lot of souvenirs yesterday?

30. Did they (put) ..out......the fish in the big bag last Sunday?

17,did Hoa try 

18,talked 

19,did they stop 

20,did the student wear 

21,did you put 

22,did you leave 

23,did Ba receive 

24,did he do 

25,did you go 

26,went 

27,had

28,Did his uncle take 

29,Did Liz buy 

30,Did they put 

31,Did they eat 

32,wore

33,taught 

34,Did Bad and Tan remember 

35,Did Nam return 

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