18.→I know the woman who lives upstairs.
19.→It's the dog which I always talk to at night.
20.→She opened the cupboard in which she kept her best glasses.
21.→This is the house where General Giap lived.
22.→The flight which we were going to take was canceled.
23.→I saw the lady who was Vicki Zhao in the shop.
24.→My violin which was my birthday present is missing.
Chúc bạn học tốt !