Defining/nondefining relative clauses

The hotel,______ is in the centre of the town, is to be knocked down and replaced by a bank.

An orphanage is a place _____ children who have no parents can live and be looked after.

The horse ____ was hit by the car was only slightly hurt.

The shop ___ we usually buy our bread has closed down.

The person to ____ you sent the letter has moved to a new address.

The boy ____ dog was hit by a car has not been to school for three days.

My friend, ___ doesn't have a cell phone, suddenly knocked on the door last night.

The students _____ test grades were low had to come back after school for an extra lesson.

I didn't realize I had forgotten my passport until I reached the airport,_____ was very annoying.

Can you please return the calculator _____ you borrowed yesterday?

A hammer is a tool _____ is used to knock nails into wood.

Do you know anyone _____ could help me fix my computer?