Relative pronouns - omission

This is the car which the mechanic repaired yesterday.

• yes

• no

The flowers that I cut this morning are still fresh.

• yes

• no

Those are the students who went to Australia on holidays.

• yes

• no

They came on a bus which was a very good one.

• yes

• no

The book that I was reading yesterdaywas a detective story.

• yes

• no

I have got many friends who don't like reading.

• yes

• no

The sunglasses that I bought yesterday were within the book.

• yes

• no

The man who they saw near the window is David's uncle.

• yes

• no

I 've got a friend whose parents live abroad.

• yes

• no

The child that they met on the beach was alone.

• yes

• no