Non-defining relative clauses

Last week he got a phone call from his father, _____________  he hadn't spoken to in years.

When I left they threw me a party,______________ was a complete surprise.

My birthday, _______________ was my 40th, turned out to be a wonderful day!

The Javan tiger, ________ habitat was largely destroyed by humans, is now extinct.

The hostel, _______________ we've stayed at several times, is simple but clean.

I sometimes go and study in my local park, __________ I can get some fresh air.

Winter,________________ temperatures are lower, sees higher rainfall.

They went to a concert at the new arena, _______________ was built last year.

She offered me a coffee, ________________  was just what I needed!

Yesterday, ______________ was a holiday, we visited my sister-in-law.

He works with his parents, _______________ company makes furniture.