1. The woman whom I met on the train was a fortune teller.

 - Đại từ quan hệ Whom + S + V

2. I really enjoy the story which was written by my friend.

 - Đại từ quan hệ Which(thing): N(thing) + which + V + O (chủ ngữ)

3. This tablet which my father bought in Japan, is very useful for my studies.

 - Đại từ quan hệ Which(thing): N(thing) + which + S + V + O (tân ngữ)

4. My smartphone, which was repaired last week, takes beautiful pictures.

5. Andy is a student who likes learning online.

6. Mrs.Minh is a kind doctor, whose son is addicted to video games.

 - Đại từ quan hệ Whose dùng để chỉ sở hữu cho danh từ chỉ người hoặc vật, thay thế cho tính từ sở hữu hoặc sở hữu cách.

7. Her children are rich, which makes him very proud.

`1.` The woman whom I met on the train was a fortune teller 

`2.` I really enjoy the story ( which was ) written by my friend

`3.` This tablet, which my father bought in Japan, is very useful for my studies.

`4.` My smartphone, which was repaired last week, takes beautiful pictures 

`5.` Andy is a student who likes learning online.

`6.` Mrs.Minh is a kind doctor, whose son is addicted to video games 

`7.` His children are rich, which makes him very proud.