`~rai~`

$\begin{array}{I}\text{17.This is the laptop which my mother has bought.}\\\text{18.That's the man whose car is a Ferrari.}\\\text{19.I know the woman who lives upstairs.}\\\text{20.It's the dog which I always talk to at night.}\\\text{21.She opened the cupboard in which she kept her best glasses.}\\\text{22.This is the house where General Giap lived.}\\\text{23.The flight which we were going to take was canceled.}\\\text{24.I saw the lady who was Vicki Zhao in the shop.}\\\text{25.The man whose dog is sick is a director.}\\\text{26.My violin which was my birthday present is missing.}\\\text{27.I first learnt English from a book which I've reread.}\\\text{28.The police officer has just arrested a man who robbed the bank.}\\\text{29.These are the shoes which I bought in HCMC.}\\\text{30.She bought the car which her father had recommended.}\\\text{31.He lost the pen which I had given to him.}\end{array}$

17. This is the laptop which my mother has just bought.

18. That's the man whose car is a Ferrari.

19. I know the woman who lives upstairs.

20. It's the dog which I always talk to at night.

21. She opened the cupboard in which  she kept her best glasses.

22. This is the house where General Giap lived.

23. The flight which we were going to take was canceled.

24. I saw the lady who was Vicki Zhao in the shop.

25. The man whose dog is sick is a director.

26. My violin which was my birthday present is missing.

27. I first learn English from a book which I've just reread.

28. The police officer has just arrested a man who robbed the bank.

29. These are the shoes which I bought in HCMC.

30. She bought the car which her father had recommended.

31. He lost the pen which I had given to him.