60.I have one black cat whose name is Blacky.
61.A herbivore is an animal which feeds upon vegetation.
63.Sydney,which isn't the capital of Australia,is the largest Australian city.
64.Brenda is a friend,whom I went on holiday with.
65.This is Mr.Smith,whose son Bill plays in our team.
66.Her book,which became the best seller,was published last year.
67.This is the bank,which we borrow the money from.
68.I told you about a person who is at the door.