=>
B/
1. The radio which is not very old has suddenly stopped working.
2. The people whom we visited yesterday were very nice.
3. The girl who is afraid of airplanes decided to travel by train.
4. I like listening to music which can help me relax after a hard working day.
5. Whales and dolphins both make sounds which are similar to a language.
6. A woman who was very helpful spoke to me.
7. The girl who is my close friend sits next to me.
8. I always admire Mr.Tuan who always gives me a lot of useful pieces of advice.
9. Minu, which looks afer my house very well, is my favorite dog.
10. My grandmother who loves me a lot often tells me many good stories.
C/
1. A. We stayed at the Grand hotel which Ann recommended to us
2. D I saw a girl whose beauty took my breath away
3. B The boy who sat beside you at the party last night is Jane’s brother
4. C John whose mother is in the hospital is absent from school
5. B It’s the book which is interested children of all ages
6. A Paris is the city which I’ve always wanted to visit