=>
1. The first boy who knows the truth has just moved.
2. I don't remember the man whom you said you met at the canteen last week.
3. The only thing which makes me worried is how to go home.
4. The most beautiful girl, whose long hair I like very much, lives in city.
5. The man whom I met at the bar yesterday was Tom. 
6. The children often go swimming on Sundays when they have much free time.
7. They are looking for the man and his dog htat have lost the way in the forest.
8. The tree which stands near the gate of my house has lovely flowers.
9. My wife, whom you were speaking to, wants you to come to dinner.
10. I want to talk to the last man who has just returned from the farm.
11. The stduents whose reports are very valuable will be awarded the present.

1. The first boy who has just moved, knows the truth.

2. I don’t remember the man whom you said you met him at the canteen last week. 

3. The only thing which make me worried, is how to go home.

4. The most beautiful girl whose long hair I like very much, lives city.

5. He was Tom whom I met at the bar yesterday.

6. The children often go swimming on Sundays when they have much free time.

7. They are looking for the man and his dog that have lost the way in the forest.

8. My wife whom you were speaking to, wants you to come to dinner.

9. The last man whom I want to talk to at once, has just returned from the farm.

10. The students whose reports are very valuable, will be awared the present.

Giải thích:

who + V

whom + S + V + O

which + V / S + V + O