Defining vs Nondefining clauses

That is the man _____ helped me when I fell down in the street.

• that

• which

• what

This is the park _____ we first met. Do you remember?

• which

• where

• that

They had to put away the dog _____ bit the boy. It was too dangerous.

• that

• which

• who

I'm looking for a person _____ surname begins with a "k".

• who's

• whose

• which

Do you still go to that bar _____ we used to go as students?

• where

• which

• that

Jim, _____ I've known for years, is my best friend.

• who

• that

• whose

He didn't even say "thank you", _____ I found really rude.

• what

• which

• who

Next summer I'm going to India, _____ I've never been before.

• that

• what

• where

Sally is a committee member _____ finds it difficult to make decisions.

• which

• who

• whose

Taylor has a new car, ____ is twice as big as his old one.

• that

• which

• who