Relative Clauses B2.5

The firefighters (a)   went into the building tried to put out the fire.

My grandfather, (a)   's 87, goes swimming every day.

The house, (a)   was built in 1883, has just been opened to the public.

The award was given to Sara, (a)   short story impressed the judges.

Yesterday I met my new boss, (a)   was very nice.

These are the flights (a)   have been cancelled.

He's the man (a)   I met at the conference.

The laptop (a)   I bought last week has started making a strange noise!

There was a one-year guarantee (a)   came with the TV.

December, (a)   Christmas is celebrated in, is a summer month for the southern hemisphere