I.

1. cleaned

2. would be able 

3. didn't belong

4. won

5. would you do

6. knew

7 gave

8. stopped

9.  wouldn't come

10. saw

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II.

1. Alice, whose mother died last year, is my friend

2. The boy who drew that stone will be punished

3. Ann, who lives next door, is very friendly

4. The man whom you met him at the party last night is a famous actor

5. There are some words which are very difficult to translate

6. I 've found a book for which I was looking this morning.

7. Is that the car which you want to buy ?

8. Sandra, to whom you are talking, works an advertising

9. The little girl who sat next to me on the coach ate sweets the whole way

10. Lan, whose tape recorder was stolen, is a journalist
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III.

1. I don't know the name of the woman to whom I spoke on the phone

2. We often go to visit our friends in Bristol, where is only 30 miles away

3. This is Mr Carter, about whom I was telling you

4. This is the room in which the meeting is held.

5. I'll always remember the day on which I first saw that sight

6. She was born in Malaysia, where rubber trees grow well

7. No one knows the school at which my uncle taught 10 years ago

8. Please ask them the time when the train started the trip 

9. New Year's Day is a day, when all family members gather and enjoy a family dinner

10. There are many hotels where tourist can enjoy their holiday.

Chúc bạn học tốt!!