giúp mình bài này với ạ

37. The last time I saw Lan was at Tam's birthday party. (HAVEN'T)

`->`  I haven't seen Lan since Tam ' birthday party .

38. What did he tell you? (NEED TO KNOW)

`->`  I need to know what he told you. 

39. Where did they go on holiday? (KNOW)

`->` Do you know where they went on holiday ?

40. Where is the dentist's office? (HOW)

`->` Could you tell me how to go to the dentist's office ?

`text{Chúc học tốt.}`