=>
1. A woman who told me you was busy answered the phone.
2. The bus which I take to school every morning is always crowded.
3. They are singing a song which I don't know.
4. A man who was very helpful spoke to me.
5. A midwife is a woman who assists other women in childbirth.

6. They are the children whose team won the match.
7. The house which has the green shutters is for sale. 
8. My father bought a motor bike which costs 2 thousand dollars.
9. They are the postcards which I sent from Australia.
10. The house which has been built in the forest doesn't have electricity.
11. The girl who arrived here at 6:30 chatted with him yesterday.

1. A woman who answered the phone told me you were busy.
2. The bus which I take to school every morning is always crowded.
3. I don't know the song which they are singing.
4. A man who spoke to me was very helpful.  
5.A midwife is a woman who assists other woman in childbirth.
6. They are the children whose team won the match.
7. The house which has the green shutters is for sale.
8. My father bought a motorbike which costs 2 thousand dollars.
9. They are the postcards which I sent from Australia.
10 The house which doesn't have electricity has been built in the forest.
11. The girl who arrived here at 6:30 chatted with him yesterday .