`1.` My family spent four days in India, whose culture is unique.

`2.` Organising self-guided tours helps develop personal skills, which are important for everybody.

`3.` Russel stayed in a hotel in Bui Vien Street, which is one of the best streets for foreign tourists.

`4. `After the Muay Thai Show, my sons talked to the artists, whom they admired very much.

`5. `We participated in a lot of activities with the local people, who were friendly and helpful.

`6. `I met a woman whose husband is a famous linguist.

`@@@@@@@`

`@` N vật, động vật + which 

`@` N người + who + V

                    + whom + S

                    + whose + N