... shouldnt cut the flowers in this garden When was this car bought? A When they buy this car ? B When did they bought this car? C When did they buy this car? D When are they bought this car? Why isnt she ... ngi v vt This is the book Its cover is nice -> This is the book whose cover is nice -> This is the book the cover of which is nice WHOSE :ng troc danh t OF WHICH : ng sau danh t ( danh t ú phi ... du phy ? Khi danh t ng trc who ,which,whom l : + Danh t rieng ,ten Ha Noi, which Mary, who is + Cú this ,that ,these ,those ng trc danh t : This book, which + Cú s hu ng trc danh t : My mother,...