Combine these sentences using non-defining relative clauses
1. There are four chairs. One of them is red. It is broken. It cannot be used.
The red chair (...) cannot be used.
2. Mr. Arnold has a son. He lives abroad. He is very well off.
Mr. Arnold's son (...) is very well off.
3. Allison is a good friend of mine. Her mother is my maths teacher.
Allison (...) is a good friend of mine.
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Daje NAJ!