Add commas to make non-defining relative clauses.


1 Last Christmas when we were on holiday


wh


it snowed twice.


2 My sister, who loves cooking, showed me how to


make pizza.


3 Spain where we go most summers/is one of my


favourite places.


4 Social networks/which are becoming more and


more popular, can be a good way to stay in touch.


5 My friend, whose brother is friends with my brother,


lives near me.