40- went
41- did-have
42-did-took
43-did- bought
45-did put

41. went
42. did he have
43. did..take
44. did..buy
45. did they put
46.eating
47.wear
48.is teach

41. You (go).................went.................. to Dalat for last tet vacation.
42. …did……He (have)........have.............. a lot of friends in Ho Chi Minh city 3 years ago?
43. did…… Nam’s parents (take).......take............. him to see Tri Nguyen aquarium last week?
44. ……did…..Liz (buy).........buy.................. a lot of souvenirs yesterday?
45. …did………They (put)...........put................ the fish in the big bag last Sunday?
46. did……….They (eat)............eat................meat in her meals in Vung Tau yesterday?
47. I(wear) ...........wore..............the cap with a dolphin om it yesterday.
48. Liz (teach).................taught................ Ba some English last week.
49. They ( start)………started…………. up their workshop  100 years ago.
50. They ( leave) …left……… Noi Bai airport and (arrive) ……arived……in HCM city 2 hours ago