Defining & non-defining relative clauses

Which sentence is correct if: I have three brothers.

• My brother who lives in Sidney came to see me last month.

• My brother, who lives in Sidney, came to see me last month.

Which sentence is correct if: I have one sister.

• My sister who is 25 years old spent her holiday in France.

• My sister, who is 25 years old, spent her holiday in France.

Which sentence is correct if: Bob's mum has lost her keys.

• Bob's mum who is a musician has lost her car keys.

• Bob's mum, who is a musician, has lost her car keys.

Which sentence is correct if: My friend Jane moved to Canada.

• My friend Jane whose husband is Canadian moved to Canada last week.

• My friend Jane, whose husband is Canadian, moved to Canada last week.

Which sentence is correct if: Tamara has two cats. Both of them are black.

• Tamara's two cats which can play outside are black.

• Tamara's two cats, which can play outside, are black.

Which sentence is correct if: Kevin has four cats. Two of them are black.

• Kevin's two cats which are black can play outside.

• Kevin's two cats, which are black, can play outside.

Which sentence is correct if: We are on holiday. Yesterday we visited a church.

• The church which we visited yesterday is very old.

• The church, which we visited yesterday, is very old.

Which sentence is correct if: We are on holiday. Yesterday we visited a church.

• St. Mary's Church which we visited yesterday is very old.

• St. Mary's Church, which we visited yesterday, is very old.

Dublin, ..... is the capital of Ireland, is my favourite city.

• which

• that

• who

• where

She loves books ..... have happy endings

• who

• that

• what

• whose