The cat with a white tail isn’t _______. I think itbelongs to _______.

hard to believe that Jack ________ havefought with the policeman—Yes If one ________ ask for trouble, it can’t behelped

Just like fingerprints, each person’s DNA is ________unless he has a twin．

tern culture,21 was the age________ young people traditionallyreceived a key to their parents’ door, as a symbol of entering adulthood

．—Have you read the book Oliver Twist? —Who_______it?