Wider World 4 unit 9.2 Defining and non-defining relative clauses

This is the place ______ I saw him the last time.

Do you know the musician ______ is playing the guitar.

This is the person ______ I introduced you a few weeks ago.

I can't find the market ______ I bought my computer two years ago.

What's the book ______ we must read this term?

That is the boy ______ parents are getting divorced.

The final decision, ______ not everybody is going to like, will be announced at the next meeting.

That laptop is much better than the first laptop ______ you showed me.

The house, _____ cost more than 50,000 dollars, was a present from his family.

We'll always remember the day ____ we met.

They are building a robot _____ can form an 'emotional connection' with humans.

Do you remember the summer _____ Jack came home by surprise.

The bus ........ goes to Kyiv leaves at midday.

Study the situation and then decide whether the following relative clauses are defining or non-defining. Think about vital or extra information. Choose the sentence without commas (defining clause) or with commas (non-defining clause).

Bob's mum has lost her keys.

Tina ..... lived here before her marriage.

My sister, whose husband is Indian, is a professional violinist.

My roommate's mother ..... is a doctor.

The sentence below indicates that

My sister who works at the hospital is a friend of mine.

Ann wants me to do some more work for her.I've worked for Ann before.

Tom bought a phone yesterday.The phone doesn’t work.