1.A dictionary is a book. It gives you the meaning of words.
A dictionary is a book which gives you the meaning of words.

2.The man was very kind. I talk to him yesterday.
The man whom I talk to yesterday was very kind.

3.Nam is an excellent student. His father's death made him sad a lot.
Nam whose father's death made him sad a lot is an excellent student.

4.The children are playing soccer in the stadium. Do you know them?
Do you know the children who are playing soccer in the stadium?

5.The little boy lost his way. He is crying over there.
The little boy who is crying over there lost his way.

1) A dictionary is book which gives you the meaning of the words.

2) The man whom i talked to yesterday was very kind.

3) Nam whose father's death made him sad a lot is an excellent student.

4) Do you know the children who are playing soccer in the stadium?

5) Kim lien where ho chi minh was born and lived is a village.