5. That's the girl ( that, who, whose) brother sits next to me
N (person) + WHOM + S + V
6. The meal ( that, which, whose) wasn't very tasty, was expensive
….N (thing) + WHICH + V + O
7. We didn't enjoy the play ( that. who, whose) we went to see
that thay thế cho " the play"
`->` Câu không chỉ người `->` loại who
`->` Câu không có TTSH `->` loại whose
8. She gives her children everything ( that, what, who) they want
Khi thay thế cho danh từ chỉ vật trong mệnh đề quan hệ, ta có thể sử dụng “which/that”