Соедине два предложения с who/which Model: I wrote to the friend. He had a birthday last week.
Iwrote to the friend who had a brithday last week
1) I bought a house. It was nice
2) Alice has got a friend. He dances well
3) He received the letter. He was waiting for it
4) I forgot to print the article. I wrote it yesterday
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1)I bought a house, which was nice
2)Alice has got a friend,which dances well
3)He received the letter,which was waiting for it
4)I forgot to print the article,who wrote it yesterday